| 1 |
two-sum |
Python CSharp |
📝 |
Easy |
| 2 |
add-two-numbers |
|
📝 |
Medium |
| 3 |
longest-substring-without-repeating-characters |
|
📝 |
Medium |
| 4 |
median-of-two-sorted-arrays |
|
📝 |
Hard |
| 5 |
longest-palindromic-substring |
|
📝 |
Medium |
| 6 |
zigzag-conversion |
|
📝 |
Medium |
| 7 |
reverse-integer |
|
📝 |
Easy |
| 8 |
string-to-integer-atoi |
|
|
Medium |
| 9 |
palindrome-number |
|
📝 |
Easy |
| 10 |
regular-expression-matching |
|
📝 |
Hard |
| 11 |
container-with-most-water |
|
📝 |
Medium |
| 12 |
integer-to-roman |
|
|
Medium |
| 13 |
roman-to-integer |
|
|
Easy |
| 14 |
longest-common-prefix |
|
📝 |
Easy |
| 15 |
3sum |
|
|
Medium |
| 16 |
3sum-closest |
|
|
Medium |
| 17 |
letter-combinations-of-a-phone-number |
|
📝 |
Medium |
| 18 |
4sum |
|
|
Medium |
| 19 |
remove-nth-node-from-end-of-list |
|
📝 |
Medium |
| 20 |
valid-parentheses |
|
📝 |
Easy |
| 21 |
merge-two-sorted-lists |
|
📝 |
Easy |
| 22 |
generate-parentheses |
|
📝 |
Medium |
| 23 |
merge-k-sorted-lists |
|
📝 |
Hard |
| 24 |
swap-nodes-in-pairs |
|
|
Medium |
| 25 |
reverse-nodes-in-k-group |
|
|
Hard |
| 26 |
remove-duplicates-from-sorted-array |
|
📝 |
Easy |
| 27 |
remove-element |
|
📝 |
Easy |
| 28 |
implement-strstr |
|
|
Easy |
| 29 |
divide-two-integers |
|
|
Medium |
| 30 |
substring-with-concatenation-of-all-words |
|
|
Hard |
| 31 |
next-permutation |
|
📝 |
Medium |
| 32 |
longest-valid-parentheses |
|
📝 |
Hard |
| 33 |
search-in-rotated-sorted-array |
|
📝 |
Medium |
| 34 |
find-first-and-last-position-of-element-in-sorted-array |
|
📝 |
Medium |
| 35 |
search-insert-position |
|
|
Easy |
| 36 |
valid-sudoku |
|
📝 |
Medium |
| 37 |
sudoku-solver |
|
📝 |
Hard |
| 38 |
count-and-say |
|
|
Easy |
| 39 |
combination-sum |
|
|
Medium |
| 40 |
combination-sum-ii |
|
|
Medium |
| 41 |
first-missing-positive |
|
📝 |
Hard |
| 42 |
trapping-rain-water |
|
📝 |
Hard |
| 43 |
multiply-strings |
|
|
Medium |
| 44 |
wildcard-matching |
|
📝 |
Hard |
| 45 |
jump-game-ii |
|
|
Hard |
| 46 |
permutations |
|
📝 |
Medium |
| 47 |
permutations-ii |
|
|
Medium |
| 48 |
rotate-image |
|
📝 |
Medium |
| 49 |
group-anagrams |
|
📝 |
Medium |
| 50 |
powx-n |
|
📝 |
Medium |
| 51 |
n-queens |
|
📝 |
Hard |
| 52 |
n-queens-ii |
|
📝 |
Hard |
| 53 |
maximum-subarray |
|
📝 |
Easy |
| 54 |
spiral-matrix |
|
📝 |
Medium |
| 55 |
jump-game |
|
📝 |
Medium |
| 56 |
merge-intervals |
|
📝 |
Medium |
| 57 |
insert-interval |
|
📝 |
Hard |
| 58 |
length-of-last-word |
|
|
Easy |
| 59 |
spiral-matrix-ii |
|
|
Medium |
| 60 |
permutation-sequence |
|
|
Medium |
| 61 |
rotate-list |
|
📝 |
Medium |
| 62 |
unique-paths |
|
|
Medium |
| 63 |
unique-paths-ii |
|
📝 |
Medium |
| 64 |
minimum-path-sum |
|
📝 |
Medium |
| 65 |
valid-number |
|
|
Hard |
| 66 |
plus-one |
|
|
Easy |
| 67 |
add-binary |
|
|
Easy |
| 68 |
text-justification |
|
|
Hard |
| 69 |
sqrtx |
|
📝 |
Easy |
| 70 |
climbing-stairs |
|
📝 |
Easy |
| 71 |
simplify-path |
|
|
Medium |
| 72 |
edit-distance |
|
📝 |
Hard |
| 73 |
set-matrix-zeroes |
|
📝 |
Medium |
| 74 |
search-a-2d-matrix |
|
📝 |
Medium |
| 75 |
sort-colors |
|
📝 |
Medium |
| 76 |
minimum-window-substring |
|
📝 |
Hard |
| 77 |
combinations |
|
📝 |
Medium |
| 78 |
subsets |
|
|
Medium |
| 79 |
word-search |
|
|
Medium |
| 80 |
remove-duplicates-from-sorted-array-ii |
|
|
Medium |
| 81 |
search-in-rotated-sorted-array-ii |
|
|
Medium |
| 82 |
remove-duplicates-from-sorted-list-ii |
|
|
Medium |
| 83 |
remove-duplicates-from-sorted-list |
|
📝 |
Easy |
| 84 |
largest-rectangle-in-histogram |
|
📝 |
Hard |
| 85 |
maximal-rectangle |
|
📝 |
Hard |
| 86 |
partition-list |
|
📝 |
Medium |
| 87 |
scramble-string |
|
|
Hard |
| 88 |
merge-sorted-array |
|
📝 |
Easy |
| 89 |
gray-code |
|
|
Medium |
| 90 |
subsets-ii |
|
|
Medium |
| 91 |
decode-ways |
|
|
Medium |
| 92 |
reverse-linked-list-ii |
|
📝 |
Medium |
| 93 |
restore-ip-addresses |
|
📝 |
Medium |
| 94 |
binary-tree-inorder-traversal |
|
📝 |
Medium |
| 95 |
unique-binary-search-trees-ii |
|
📝 |
Medium |
| 96 |
unique-binary-search-trees |
|
📝 |
Medium |
| 97 |
interleaving-string |
|
📝 |
Hard |
| 98 |
validate-binary-search-tree |
|
📝 |
Medium |
| 99 |
recover-binary-search-tree |
|
📝 |
Hard |
| 100 |
same-tree |
|
📝 |
Easy |
| 101 |
symmetric-tree |
|
📝 |
Easy |
| 102 |
binary-tree-level-order-traversal |
|
📝 |
Medium |
| 103 |
binary-tree-zigzag-level-order-traversal |
|
|
Medium |
| 104 |
maximum-depth-of-binary-tree |
|
📝 |
Easy |
| 105 |
construct-binary-tree-from-preorder-and-inorder-traversal |
|
📝 |
Medium |
| 106 |
construct-binary-tree-from-inorder-and-postorder-traversal |
|
📝 |
Medium |
| 107 |
binary-tree-level-order-traversal-ii |
|
|
Easy |
| 108 |
convert-sorted-array-to-binary-search-tree |
|
|
Easy |
| 109 |
convert-sorted-list-to-binary-search-tree |
|
📝 |
Medium |
| 110 |
balanced-binary-tree |
|
|
Easy |
| 111 |
minimum-depth-of-binary-tree |
|
📝 |
Easy |
| 112 |
path-sum |
|
📝 |
Easy |
| 113 |
path-sum-ii |
|
|
Medium |
| 114 |
flatten-binary-tree-to-linked-list |
|
|
Medium |
| 115 |
distinct-subsequences |
|
|
Hard |
| 116 |
populating-next-right-pointers-in-each-node |
|
|
Medium |
| 117 |
populating-next-right-pointers-in-each-node-ii |
|
|
Medium |
| 118 |
pascals-triangle |
|
📝 |
Easy |
| 119 |
pascals-triangle-ii |
|
|
Easy |
| 120 |
triangle |
|
|
Medium |
| 121 |
best-time-to-buy-and-sell-stock |
|
📝 |
Easy |
| 122 |
best-time-to-buy-and-sell-stock-ii |
|
📝 |
Easy |
| 123 |
best-time-to-buy-and-sell-stock-iii |
|
|
Hard |
| 124 |
binary-tree-maximum-path-sum |
|
📝 |
Hard |
| 125 |
valid-palindrome |
|
|
Easy |
| 126 |
word-ladder-ii |
|
|
Hard |
| 127 |
word-ladder |
|
📝 |
Medium |
| 128 |
longest-consecutive-sequence |
|
📝 |
Hard |
| 129 |
sum-root-to-leaf-numbers |
|
|
Medium |
| 130 |
surrounded-regions |
|
|
Medium |
| 131 |
palindrome-partitioning |
|
|
Medium |
| 132 |
palindrome-partitioning-ii |
|
|
Hard |
| 133 |
clone-graph |
|
|
Medium |
| 134 |
gas-station |
|
📝 |
Medium |
| 135 |
candy |
|
📝 |
Hard |
| 136 |
single-number |
|
📝 |
Easy |
| 137 |
single-number-ii |
|
📝 |
Medium |
| 138 |
copy-list-with-random-pointer |
|
📝 |
Medium |
| 139 |
word-break |
|
📝 |
Medium |
| 140 |
word-break-ii |
|
📝 |
Hard |
| 141 |
linked-list-cycle |
|
📝 |
Easy |
| 142 |
linked-list-cycle-ii |
|
📝 |
Medium |
| 143 |
reorder-list |
|
|
Medium |
| 144 |
binary-tree-preorder-traversal |
|
📝 |
Medium |
| 145 |
binary-tree-postorder-traversal |
|
📝 |
Hard |
| 146 |
lru-cache |
|
📝 |
Medium |
| 147 |
insertion-sort-list |
|
|
Medium |
| 148 |
sort-list |
|
|
Medium |
| 149 |
max-points-on-a-line |
|
📝 |
Hard |
| 150 |
evaluate-reverse-polish-notation |
|
|
Medium |
| 151 |
reverse-words-in-a-string |
|
|
Medium |
| 152 |
maximum-product-subarray |
|
|
Medium |
| 153 |
find-minimum-in-rotated-sorted-array |
|
📝 |
Medium |
| 154 |
find-minimum-in-rotated-sorted-array-ii |
|
|
Hard |
| 155 |
min-stack |
|
|
Easy |
| 156 |
binary-tree-upside-down |
|
|
Medium |
| 157 |
read-n-characters-given-read4 |
|
|
Easy |
| 158 |
read-n-characters-given-read4-ii-call-multiple-times |
|
|
Hard |
| 159 |
longest-substring-with-at-most-two-distinct-characters |
|
📝 |
Hard |
| 160 |
intersection-of-two-linked-lists |
|
📝 |
Easy |
| 161 |
one-edit-distance |
|
📝 |
Medium |
| 162 |
find-peak-element |
|
📝 |
Medium |
| 163 |
missing-ranges |
|
|
Medium |
| 164 |
maximum-gap |
|
📝 |
Hard |
| 165 |
compare-version-numbers |
|
|
Medium |
| 166 |
fraction-to-recurring-decimal |
|
📝 |
Medium |
| 167 |
two-sum-ii-input-array-is-sorted |
|
📝 |
Easy |
| 168 |
excel-sheet-column-title |
|
|
Easy |
| 169 |
majority-element |
|
📝 |
Easy |
| 170 |
two-sum-iii-data-structure-design |
|
|
Easy |
| 171 |
excel-sheet-column-number |
|
|
Easy |
| 172 |
factorial-trailing-zeroes |
|
|
Easy |
| 173 |
binary-search-tree-iterator |
|
📝 |
Medium |
| 174 |
dungeon-game |
|
|
Hard |
| 179 |
largest-number |
|
📝 |
Medium |
| 186 |
reverse-words-in-a-string-ii |
|
|
Medium |
| 187 |
repeated-dna-sequences |
|
|
Medium |
| 188 |
best-time-to-buy-and-sell-stock-iv |
|
|
Hard |
| 189 |
rotate-array |
|
📝 |
Easy |
| 190 |
reverse-bits |
|
|
Easy |
| 191 |
number-of-1-bits |
|
📝 |
Easy |
| 198 |
house-robber |
|
📝 |
Easy |
| 199 |
binary-tree-right-side-view |
|
📝 |
Medium |
| 200 |
number-of-islands |
|
📝 |
Medium |
| 201 |
bitwise-and-of-numbers-range |
|
|
Medium |
| 202 |
happy-number |
|
|
Easy |
| 203 |
remove-linked-list-elements |
|
|
Easy |
| 204 |
count-primes |
|
|
Easy |
| 205 |
isomorphic-strings |
|
|
Easy |
| 206 |
reverse-linked-list |
|
📝 |
Easy |
| 207 |
course-schedule |
|
|
Medium |
| 208 |
implement-trie-prefix-tree |
|
📝 |
Medium |
| 209 |
minimum-size-subarray-sum |
|
📝 |
Medium |
| 210 |
course-schedule-ii |
|
📝 |
Medium |
| 211 |
add-and-search-word-data-structure-design |
|
|
Medium |
| 212 |
word-search-ii |
|
|
Hard |
| 213 |
house-robber-ii |
|
|
Medium |
| 214 |
shortest-palindrome |
|
📝 |
Hard |
| 215 |
kth-largest-element-in-an-array |
|
📝 |
Medium |
| 216 |
combination-sum-iii |
|
|
Medium |
| 217 |
contains-duplicate |
|
📝 |
Easy |
| 218 |
the-skyline-problem |
|
📝 |
Hard |
| 219 |
contains-duplicate-ii |
|
📝 |
Easy |
| 220 |
contains-duplicate-iii |
|
📝 |
Medium |
| 221 |
maximal-square |
|
📝 |
Medium |
| 222 |
count-complete-tree-nodes |
|
📝 |
Medium |
| 223 |
rectangle-area |
|
|
Medium |
| 224 |
basic-calculator |
|
📝 |
Hard |
| 225 |
implement-stack-using-queues |
|
📝 |
Easy |
| 226 |
invert-binary-tree |
|
📝 |
Easy |
| 227 |
basic-calculator-ii |
|
|
Medium |
| 228 |
summary-ranges |
|
📝 |
Medium |
| 229 |
majority-element-ii |
|
|
Medium |
| 230 |
kth-smallest-element-in-a-bst |
|
📝 |
Medium |
| 231 |
power-of-two |
|
📝 |
Easy |
| 232 |
implement-queue-using-stacks |
|
📝 |
Easy |
| 233 |
number-of-digit-one |
|
📝 |
Hard |
| 234 |
palindrome-linked-list |
|
|
Easy |
| 235 |
lowest-common-ancestor-of-a-binary-search-tree |
|
📝 |
Easy |
| 236 |
lowest-common-ancestor-of-a-binary-tree |
|
📝 |
Medium |
| 237 |
delete-node-in-a-linked-list |
|
📝 |
Easy |
| 238 |
product-of-array-except-self |
|
📝 |
Medium |
| 239 |
sliding-window-maximum |
|
📝 |
Hard |
| 240 |
search-a-2d-matrix-ii |
|
📝 |
Medium |
| 241 |
different-ways-to-add-parentheses |
|
|
Medium |
| 242 |
valid-anagram |
|
📝 |
Easy |
| 243 |
shortest-word-distance |
|
📝 |
Easy |
| 244 |
shortest-word-distance-ii |
|
📝 |
Medium |
| 245 |
shortest-word-distance-iii |
|
|
Medium |
| 246 |
strobogrammatic-number |
|
|
Easy |
| 247 |
strobogrammatic-number-ii |
|
|
Medium |
| 248 |
strobogrammatic-number-iii |
|
|
Hard |
| 249 |
group-shifted-strings |
|
|
Medium |
| 250 |
count-univalue-subtrees |
|
📝 |
Medium |
| 251 |
flatten-2d-vector |
|
|
Medium |
| 252 |
meeting-rooms |
|
📝 |
Easy |
| 253 |
meeting-rooms-ii |
|
📝 |
Medium |
| 254 |
factor-combinations |
|
|
Medium |
| 255 |
verify-preorder-sequence-in-binary-search-tree |
|
|
Medium |
| 256 |
paint-house |
|
|
Easy |
| 257 |
binary-tree-paths |
|
📝 |
Easy |
| 258 |
add-digits |
|
|
Easy |
| 259 |
3sum-smaller |
|
📝 |
Medium |
| 260 |
single-number-iii |
|
|
Medium |
| 261 |
graph-valid-tree |
|
|
Medium |
| 263 |
ugly-number |
|
|
Easy |
| 264 |
ugly-number-ii |
|
📝 |
Medium |
| 265 |
paint-house-ii |
|
|
Hard |
| 266 |
palindrome-permutation |
|
📝 |
Easy |
| 267 |
palindrome-permutation-ii |
|
📝 |
Medium |
| 268 |
missing-number |
|
📝 |
Easy |
| 269 |
alien-dictionary |
|
|
Hard |
| 270 |
closest-binary-search-tree-value |
|
📝 |
Easy |
| 271 |
encode-and-decode-strings |
|
📝 |
Medium |
| 272 |
closest-binary-search-tree-value-ii |
|
|
Hard |
| 273 |
integer-to-english-words |
|
📝 |
Hard |
| 274 |
h-index |
|
📝 |
Medium |
| 275 |
h-index-ii |
|
📝 |
Medium |
| 276 |
paint-fence |
|
|
Easy |
| 277 |
find-the-celebrity |
|
|
Medium |
| 278 |
first-bad-version |
|
📝 |
Easy |
| 279 |
perfect-squares |
|
|
Medium |
| 280 |
wiggle-sort |
|
📝 |
Medium |
| 281 |
zigzag-iterator |
|
|
Medium |
| 282 |
expression-add-operators |
|
📝 |
Hard |
| 283 |
move-zeroes |
|
📝 |
Easy |
| 284 |
peeking-iterator |
|
|
Medium |
| 285 |
inorder-successor-in-bst |
|
📝 |
Medium |
| 286 |
walls-and-gates |
|
📝 |
Medium |
| 287 |
find-the-duplicate-number |
|
📝 |
Medium |
| 288 |
unique-word-abbreviation |
|
📝 |
Medium |
| 289 |
game-of-life |
|
📝 |
Medium |
| 290 |
word-pattern |
|
|
Easy |
| 291 |
word-pattern-ii |
|
|
Hard |
| 292 |
nim-game |
|
📝 |
Easy |
| 293 |
flip-game |
|
|
Easy |
| 294 |
flip-game-ii |
|
|
Medium |
| 295 |
find-median-from-data-stream |
|
📝 |
Hard |
| 296 |
best-meeting-point |
|
📝 |
Hard |
| 297 |
serialize-and-deserialize-binary-tree |
|
📝 |
Hard |
| 298 |
binary-tree-longest-consecutive-sequence |
|
📝 |
Medium |
| 299 |
bulls-and-cows |
|
|
Easy |
| 300 |
longest-increasing-subsequence |
|
📝 |
Medium |
| 301 |
remove-invalid-parentheses |
|
📝 |
Hard |
| 302 |
smallest-rectangle-enclosing-black-pixels |
|
📝 |
Hard |
| 303 |
range-sum-query-immutable |
|
📝 |
Easy |
| 304 |
range-sum-query-2d-immutable |
|
📝 |
Medium |
| 305 |
number-of-islands-ii |
|
📝 |
Hard |
| 306 |
additive-number |
|
|
Medium |
| 307 |
range-sum-query-mutable |
|
📝 |
Medium |
| 308 |
range-sum-query-2d-mutable |
|
|
Hard |
| 309 |
best-time-to-buy-and-sell-stock-with-cooldown |
|
|
Medium |
| 310 |
minimum-height-trees |
|
|
Medium |
| 311 |
sparse-matrix-multiplication |
|
|
Medium |
| 312 |
burst-balloons |
|
📝 |
Hard |
| 313 |
super-ugly-number |
|
|
Medium |
| 314 |
binary-tree-vertical-order-traversal |
|
|
Medium |
| 315 |
count-of-smaller-numbers-after-self |
|
|
Hard |
| 316 |
remove-duplicate-letters |
|
📝 |
Hard |
| 317 |
shortest-distance-from-all-buildings |
|
|
Hard |
| 318 |
maximum-product-of-word-lengths |
|
📝 |
Medium |
| 319 |
bulb-switcher |
|
|
Medium |
| 320 |
generalized-abbreviation |
|
📝 |
Medium |
| 321 |
create-maximum-number |
|
|
Hard |
| 322 |
coin-change |
|
📝 |
Medium |
| 323 |
number-of-connected-components-in-an-undirected-graph |
|
|
Medium |
| 324 |
wiggle-sort-ii |
|
|
Medium |
| 325 |
maximum-size-subarray-sum-equals-k |
|
|
Medium |
| 326 |
power-of-three |
|
📝 |
Easy |
| 327 |
count-of-range-sum |
|
|
Hard |
| 328 |
odd-even-linked-list |
|
📝 |
Medium |
| 329 |
longest-increasing-path-in-a-matrix |
|
📝 |
Hard |
| 330 |
patching-array |
|
📝 |
Hard |
| 331 |
verify-preorder-serialization-of-a-binary-tree |
|
📝 |
Medium |
| 332 |
reconstruct-itinerary |
|
|
Medium |
| 333 |
largest-bst-subtree |
|
|
Medium |
| 334 |
increasing-triplet-subsequence |
|
|
Medium |
| 335 |
self-crossing |
|
|
Hard |
| 336 |
palindrome-pairs |
|
|
Hard |
| 337 |
house-robber-iii |
|
|
Medium |
| 338 |
counting-bits |
|
📝 |
Medium |
| 339 |
nested-list-weight-sum |
|
📝 |
Easy |
| 340 |
longest-substring-with-at-most-k-distinct-characters |
|
📝 |
Hard |
| 341 |
flatten-nested-list-iterator |
|
|
Medium |
| 342 |
power-of-four |
|
|
Easy |
| 343 |
integer-break |
|
|
Medium |
| 344 |
reverse-string |
|
|
Easy |
| 345 |
reverse-vowels-of-a-string |
|
|
Easy |
| 346 |
moving-average-from-data-stream |
|
|
Easy |
| 347 |
top-k-frequent-elements |
|
📝 |
Medium |
| 348 |
design-tic-tac-toe |
|
|
Medium |
| 349 |
intersection-of-two-arrays |
|
📝 |
Easy |
| 350 |
intersection-of-two-arrays-ii |
|
|
Easy |
| 351 |
android-unlock-patterns |
|
📝 |
Medium |
| 352 |
data-stream-as-disjoint-intervals |
|
|
Hard |
| 353 |
design-snake-game |
|
|
Medium |
| 354 |
russian-doll-envelopes |
|
|
Hard |
| 355 |
design-twitter |
|
|
Medium |
| 356 |
line-reflection |
|
|
Medium |
| 357 |
count-numbers-with-unique-digits |
|
|
Medium |
| 358 |
rearrange-string-k-distance-apart |
|
|
Hard |
| 359 |
logger-rate-limiter |
|
|
Easy |
| 360 |
sort-transformed-array |
|
|
Medium |
| 361 |
bomb-enemy |
|
|
Medium |
| 362 |
design-hit-counter |
|
|
Medium |
| 363 |
max-sum-of-rectangle-no-larger-than-k |
|
|
Hard |
| 364 |
nested-list-weight-sum-ii |
|
|
Medium |
| 365 |
water-and-jug-problem |
|
|
Medium |
| 366 |
find-leaves-of-binary-tree |
|
|
Medium |
| 367 |
valid-perfect-square |
|
|
Easy |
| 368 |
largest-divisible-subset |
|
|
Medium |
| 369 |
plus-one-linked-list |
|
|
Medium |
| 370 |
range-addition |
|
📝 |
Medium |
| 371 |
sum-of-two-integers |
|
|
Easy |
| 372 |
super-pow |
|
|
Medium |
| 373 |
find-k-pairs-with-smallest-sums |
|
|
Medium |
| 374 |
guess-number-higher-or-lower |
|
📝 |
Easy |
| 375 |
guess-number-higher-or-lower-ii |
|
📝 |
Medium |
| 376 |
wiggle-subsequence |
|
📝 |
Medium |
| 377 |
combination-sum-iv |
|
|
Medium |
| 378 |
kth-smallest-element-in-a-sorted-matrix |
|
|
Medium |
| 379 |
design-phone-directory |
|
|
Medium |
| 380 |
insert-delete-getrandom-o1 |
|
|
Medium |
| 381 |
insert-delete-getrandom-o1-duplicates-allowed |
|
📝 |
Hard |
| 382 |
linked-list-random-node |
|
|
Medium |
| 383 |
ransom-note |
|
|
Easy |
| 384 |
shuffle-an-array |
|
📝 |
Medium |
| 385 |
mini-parser |
|
|
Medium |
| 386 |
lexicographical-numbers |
|
|
Medium |
| 387 |
first-unique-character-in-a-string |
|
📝 |
Easy |
| 388 |
longest-absolute-file-path |
|
|
Medium |
| 389 |
find-the-difference |
|
|
Easy |
| 390 |
elimination-game |
|
|
Medium |
| 391 |
perfect-rectangle |
|
|
Hard |
| 392 |
is-subsequence |
|
|
Easy |
| 393 |
utf-8-validation |
|
📝 |
Medium |
| 394 |
decode-string |
|
|
Medium |
| 395 |
longest-substring-with-at-least-k-repeating-characters |
|
|
Medium |
| 396 |
rotate-function |
|
|
Medium |
| 397 |
integer-replacement |
|
|
Medium |
| 398 |
random-pick-index |
|
|
Medium |
| 399 |
evaluate-division |
|
|
Medium |
| 400 |
nth-digit |
|
|
Medium |
| 401 |
binary-watch |
|
|
Easy |
| 402 |
remove-k-digits |
|
|
Medium |
| 403 |
frog-jump |
|
📝 |
Hard |
| 404 |
sum-of-left-leaves |
|
|
Easy |
| 405 |
convert-a-number-to-hexadecimal |
|
|
Easy |
| 406 |
queue-reconstruction-by-height |
|
📝 |
Medium |
| 407 |
trapping-rain-water-ii |
|
|
Hard |
| 408 |
valid-word-abbreviation |
|
|
Easy |
| 409 |
longest-palindrome |
|
📝 |
Easy |
| 410 |
split-array-largest-sum |
|
📝 |
Hard |
| 411 |
minimum-unique-word-abbreviation |
|
|
Hard |
| 412 |
fizz-buzz |
|
📝 |
Easy |
| 413 |
arithmetic-slices |
|
📝 |
Medium |
| 414 |
third-maximum-number |
|
|
Easy |
| 415 |
add-strings |
|
|
Easy |
| 416 |
partition-equal-subset-sum |
|
|
Medium |
| 417 |
pacific-atlantic-water-flow |
|
|
Medium |
| 418 |
sentence-screen-fitting |
|
|
Medium |
| 419 |
battleships-in-a-board |
|
|
Medium |
| 420 |
strong-password-checker |
|
|
Hard |
| 421 |
maximum-xor-of-two-numbers-in-an-array |
|
|
Medium |
| 422 |
valid-word-square |
|
|
Easy |
| 423 |
reconstruct-original-digits-from-english |
|
📝 |
Medium |
| 424 |
longest-repeating-character-replacement |
|
|
Medium |
| 425 |
word-squares |
|
|
Hard |
| 432 |
all-oone-data-structure |
|
|
Hard |
| 433 |
minimum-genetic-mutation |
|
|
Medium |
| 434 |
number-of-segments-in-a-string |
|
📝 |
Easy |
| 435 |
non-overlapping-intervals |
|
📝 |
Medium |
| 436 |
find-right-interval |
|
📝 |
Medium |
| 437 |
path-sum-iii |
|
|
Easy |
| 438 |
find-all-anagrams-in-a-string |
|
|
Medium |
| 439 |
ternary-expression-parser |
|
|
Medium |
| 440 |
k-th-smallest-in-lexicographical-order |
|
|
Hard |
| 441 |
arranging-coins |
|
|
Easy |
| 442 |
find-all-duplicates-in-an-array |
|
|
Medium |
| 443 |
string-compression |
|
📝 |
Easy |
| 444 |
sequence-reconstruction |
|
|
Medium |
| 445 |
add-two-numbers-ii |
|
|
Medium |
| 446 |
arithmetic-slices-ii-subsequence |
|
📝 |
Hard |
| 447 |
number-of-boomerangs |
|
|
Easy |
| 448 |
find-all-numbers-disappeared-in-an-array |
|
|
Easy |
| 449 |
serialize-and-deserialize-bst |
|
📝 |
Medium |
| 450 |
delete-node-in-a-bst |
|
📝 |
Medium |
| 451 |
sort-characters-by-frequency |
|
|
Medium |
| 452 |
minimum-number-of-arrows-to-burst-balloons |
|
📝 |
Medium |
| 453 |
minimum-moves-to-equal-array-elements |
|
📝 |
Easy |
| 454 |
4sum-ii |
|
|
Medium |
| 455 |
assign-cookies |
|
|
Easy |
| 456 |
132-pattern |
|
📝 |
Medium |
| 457 |
circular-array-loop |
|
|
Medium |
| 458 |
poor-pigs |
|
📝 |
Hard |
| 459 |
repeated-substring-pattern |
|
|
Easy |
| 460 |
lfu-cache |
|
|
Hard |
| 461 |
hamming-distance |
|
|
Easy |
| 462 |
minimum-moves-to-equal-array-elements-ii |
|
📝 |
Medium |
| 463 |
island-perimeter |
|
|
Easy |
| 464 |
can-i-win |
|
|
Medium |
| 465 |
optimal-account-balancing |
|
|
Hard |
| 466 |
count-the-repetitions |
|
📝 |
Hard |
| 467 |
unique-substrings-in-wraparound-string |
|
|
Medium |
| 468 |
validate-ip-address |
|
|
Medium |
| 469 |
convex-polygon |
|
|
Medium |
| 471 |
encode-string-with-shortest-length |
|
|
Hard |
| 472 |
concatenated-words |
|
|
Hard |
| 473 |
matchsticks-to-square |
|
📝 |
Medium |
| 474 |
ones-and-zeroes |
|
📝 |
Medium |
| 475 |
heaters |
|
|
Easy |
| 476 |
number-complement |
|
|
Easy |
| 477 |
total-hamming-distance |
|
📝 |
Medium |
| 479 |
largest-palindrome-product |
|
|
Hard |
| 480 |
sliding-window-median |
|
📝 |
Hard |
| 481 |
magical-string |
|
|
Medium |
| 482 |
license-key-formatting |
|
|
Easy |
| 483 |
smallest-good-base |
|
|
Hard |
| 484 |
find-permutation |
|
📝 |
Medium |
| 485 |
max-consecutive-ones |
|
|
Easy |
| 486 |
predict-the-winner |
|
📝 |
Medium |
| 487 |
max-consecutive-ones-ii |
|
|
Medium |
| 488 |
zuma-game |
|
|
Hard |
| 490 |
the-maze |
|
📝 |
Medium |
| 491 |
increasing-subsequences |
|
|
Medium |
| 492 |
construct-the-rectangle |
|
|
Easy |
| 493 |
reverse-pairs |
|
📝 |
Hard |
| 494 |
target-sum |
|
📝 |
Medium |
| 495 |
teemo-attacking |
|
📝 |
Medium |
| 496 |
next-greater-element-i |
|
📝 |
Easy |
| 498 |
diagonal-traverse |
|
|
Medium |
| 499 |
the-maze-iii |
|
|
Hard |
| 500 |
keyboard-row |
|
|
Easy |
| 501 |
find-mode-in-binary-search-tree |
|
|
Easy |
| 502 |
ipo |
|
📝 |
Hard |
| 503 |
next-greater-element-ii |
|
📝 |
Medium |
| 504 |
base-7 |
|
|
Easy |
| 505 |
the-maze-ii |
|
📝 |
Medium |
| 506 |
relative-ranks |
|
|
Easy |
| 507 |
perfect-number |
|
📝 |
Easy |
| 508 |
most-frequent-subtree-sum |
|
|
Medium |
| 509 |
inorder-successor-in-bst-ii |
|
📝 |
Medium |
| 511 |
all-paths-from-source-lead-to-destination |
|
|
Medium |
| 513 |
find-bottom-left-tree-value |
|
|
Medium |
| 514 |
freedom-trail |
|
|
Hard |
| 515 |
find-largest-value-in-each-tree-row |
|
|
Medium |
| 516 |
longest-palindromic-subsequence |
|
|
Medium |
| 517 |
super-washing-machines |
|
📝 |
Hard |
| 518 |
coin-change-2 |
|
|
Medium |
| 520 |
detect-capital |
|
|
Easy |
| 521 |
longest-uncommon-subsequence-i |
|
📝 |
Easy |
| 522 |
longest-uncommon-subsequence-ii |
|
📝 |
Medium |
| 523 |
continuous-subarray-sum |
|
📝 |
Medium |
| 524 |
longest-word-in-dictionary-through-deleting |
|
📝 |
Medium |
| 525 |
contiguous-array |
|
📝 |
Medium |
| 526 |
beautiful-arrangement |
|
📝 |
Medium |
| 527 |
word-abbreviation |
|
📝 |
Hard |
| 529 |
minesweeper |
|
|
Medium |
| 530 |
minimum-absolute-difference-in-bst |
|
|
Easy |
| 531 |
lonely-pixel-i |
|
|
Medium |
| 532 |
k-diff-pairs-in-an-array |
|
|
Easy |
| 533 |
lonely-pixel-ii |
|
|
Medium |
| 535 |
encode-and-decode-tinyurl |
|
📝 |
Medium |
| 536 |
construct-binary-tree-from-string |
|
|
Medium |
| 537 |
complex-number-multiplication |
|
📝 |
Medium |
| 538 |
convert-bst-to-greater-tree |
|
📝 |
Easy |
| 539 |
minimum-time-difference |
|
|
Medium |
| 540 |
single-element-in-a-sorted-array |
|
|
Medium |
| 541 |
reverse-string-ii |
|
📝 |
Easy |
| 542 |
01-matrix |
|
📝 |
Medium |
| 543 |
diameter-of-binary-tree |
|
📝 |
Easy |
| 544 |
output-contest-matches |
|
📝 |
Medium |
| 545 |
boundary-of-binary-tree |
|
📝 |
Medium |
| 546 |
remove-boxes |
|
📝 |
Hard |
| 547 |
friend-circles |
|
📝 |
Medium |
| 548 |
split-array-with-equal-sum |
|
📝 |
Medium |
| 549 |
binary-tree-longest-consecutive-sequence-ii |
|
📝 |
Medium |
| 551 |
student-attendance-record-i |
|
📝 |
Easy |
| 552 |
student-attendance-record-ii |
|
📝 |
Hard |
| 553 |
optimal-division |
|
📝 |
Medium |
| 554 |
brick-wall |
|
📝 |
Medium |
| 555 |
split-concatenated-strings |
|
📝 |
Medium |
| 556 |
next-greater-element-iii |
|
📝 |
Medium |
| 557 |
reverse-words-in-a-string-iii |
|
📝 |
Easy |
| 560 |
subarray-sum-equals-k |
|
📝 |
Medium |
| 561 |
array-partition-i |
|
📝 |
Easy |
| 562 |
longest-line-of-consecutive-one-in-matrix |
|
📝 |
Medium |
| 563 |
binary-tree-tilt |
|
📝 |
Easy |
| 564 |
find-the-closest-palindrome |
|
📝 |
Hard |
| 565 |
array-nesting |
|
📝 |
Medium |
| 566 |
reshape-the-matrix |
|
📝 |
Easy |
| 567 |
permutation-in-string |
|
📝 |
Medium |
| 568 |
maximum-vacation-days |
|
📝 |
Hard |
| 572 |
subtree-of-another-tree |
|
📝 |
Easy |
| 573 |
squirrel-simulation |
|
📝 |
Medium |
| 575 |
distribute-candies |
|
📝 |
Easy |
| 576 |
out-of-boundary-paths |
|
📝 |
Medium |
| 581 |
shortest-unsorted-continuous-subarray |
|
📝 |
Easy |
| 582 |
kill-process |
|
📝 |
Medium |
| 583 |
delete-operation-for-two-strings |
|
📝 |
Medium |
| 587 |
erect-the-fence |
|
📝 |
Hard |
| 588 |
design-in-memory-file-system |
|
📝 |
Hard |
| 591 |
tag-validator |
|
📝 |
Hard |
| 592 |
fraction-addition-and-subtraction |
|
📝 |
Medium |
| 593 |
valid-square |
|
📝 |
Medium |
| 594 |
longest-harmonious-subsequence |
|
📝 |
Easy |
| 598 |
range-addition-ii |
|
📝 |
Easy |
| 599 |
minimum-index-sum-of-two-lists |
|
📝 |
Easy |
| 600 |
non-negative-integers-without-consecutive-ones |
|
📝 |
Hard |
| 604 |
design-compressed-string-iterator |
|
📝 |
Easy |
| 605 |
can-place-flowers |
|
📝 |
Easy |
| 606 |
construct-string-from-binary-tree |
|
📝 |
Easy |
| 609 |
find-duplicate-file-in-system |
|
📝 |
Medium |
| 611 |
valid-triangle-number |
|
📝 |
Medium |
| 616 |
add-bold-tag-in-string |
|
📝 |
Medium |
| 617 |
merge-two-binary-trees |
|
📝 |
Easy |
| 621 |
task-scheduler |
|
📝 |
Medium |
| 623 |
add-one-row-to-tree |
|
📝 |
Medium |
| 624 |
maximum-distance-in-arrays |
|
📝 |
Easy |
| 625 |
minimum-factorization |
|
📝 |
Medium |
| 628 |
maximum-product-of-three-numbers |
|
📝 |
Easy |
| 629 |
k-inverse-pairs-array |
|
📝 |
Hard |
| 630 |
course-schedule-iii |
|
📝 |
Hard |
| 631 |
design-excel-sum-formula |
|
📝 |
Hard |
| 632 |
smallest-range-covering-elements-from-k-lists |
|
📝 |
Hard |
| 633 |
sum-of-square-numbers |
|
📝 |
Easy |
| 634 |
find-the-derangement-of-an-array |
|
📝 |
Medium |
| 635 |
design-log-storage-system |
|
📝 |
Medium |
| 636 |
exclusive-time-of-functions |
|
📝 |
Medium |
| 637 |
average-of-levels-in-binary-tree |
|
📝 |
Easy |
| 638 |
shopping-offers |
|
📝 |
Medium |
| 639 |
decode-ways-ii |
|
📝 |
Hard |
| 640 |
solve-the-equation |
|
📝 |
Medium |
| 642 |
design-search-autocomplete-system |
|
📝 |
Hard |
| 643 |
maximum-average-subarray-i |
|
📝 |
Easy |
| 644 |
maximum-average-subarray-ii |
|
📝 |
Hard |
| 645 |
set-mismatch |
|
📝 |
Easy |
| 646 |
maximum-length-of-pair-chain |
|
📝 |
Medium |
| 647 |
palindromic-substrings |
|
📝 |
Medium |
| 648 |
replace-words |
|
📝 |
Medium |
| 649 |
dota2-senate |
|
📝 |
Medium |
| 650 |
2-keys-keyboard |
|
📝 |
Medium |
| 651 |
4-keys-keyboard |
|
📝 |
Medium |
| 652 |
find-duplicate-subtrees |
|
📝 |
Medium |
| 653 |
two-sum-iv-input-is-a-bst |
|
📝 |
Easy |
| 654 |
maximum-binary-tree |
|
📝 |
Medium |
| 655 |
print-binary-tree |
|
📝 |
Medium |
| 656 |
coin-path |
|
📝 |
Hard |
| 657 |
robot-return-to-origin |
|
📝 |
Easy |
| 658 |
find-k-closest-elements |
|
📝 |
Medium |
| 659 |
split-array-into-consecutive-subsequences |
|
📝 |
Medium |
| 660 |
remove-9 |
|
📝 |
Hard |
| 661 |
image-smoother |
|
📝 |
Easy |
| 662 |
maximum-width-of-binary-tree |
|
📝 |
Medium |
| 663 |
equal-tree-partition |
|
📝 |
Medium |
| 664 |
strange-printer |
|
📝 |
Hard |
| 665 |
non-decreasing-array |
|
📝 |
Easy |
| 666 |
path-sum-iv |
|
📝 |
Medium |
| 667 |
beautiful-arrangement-ii |
|
📝 |
Medium |
| 668 |
kth-smallest-number-in-multiplication-table |
|
📝 |
Hard |
| 669 |
trim-a-binary-search-tree |
|
📝 |
Easy |
| 670 |
maximum-swap |
|
📝 |
Medium |
| 671 |
second-minimum-node-in-a-binary-tree |
|
📝 |
Easy |
| 672 |
bulb-switcher-ii |
|
📝 |
Medium |
| 673 |
number-of-longest-increasing-subsequence |
|
📝 |
Medium |
| 674 |
longest-continuous-increasing-subsequence |
|
📝 |
Easy |
| 675 |
cut-off-trees-for-golf-event |
|
📝 |
Hard |
| 676 |
implement-magic-dictionary |
|
📝 |
Medium |
| 677 |
map-sum-pairs |
|
📝 |
Medium |
| 678 |
valid-parenthesis-string |
|
📝 |
Medium |
| 679 |
24-game |
|
📝 |
Hard |
| 680 |
valid-palindrome-ii |
|
📝 |
Easy |
| 681 |
next-closest-time |
|
📝 |
Medium |
| 682 |
baseball-game |
|
📝 |
Easy |
| 683 |
k-empty-slots |
|
📝 |
Hard |
| 684 |
redundant-connection |
|
📝 |
Medium |
| 685 |
redundant-connection-ii |
|
📝 |
Hard |
| 686 |
repeated-string-match |
|
📝 |
Easy |
| 687 |
longest-univalue-path |
|
📝 |
Easy |
| 688 |
knight-probability-in-chessboard |
|
📝 |
Medium |
| 689 |
maximum-sum-of-3-non-overlapping-subarrays |
|
📝 |
Hard |
| 690 |
employee-importance |
|
📝 |
Easy |
| 691 |
stickers-to-spell-word |
|
📝 |
Hard |
| 692 |
top-k-frequent-words |
|
📝 |
Medium |
| 693 |
binary-number-with-alternating-bits |
|
📝 |
Easy |
| 694 |
number-of-distinct-islands |
|
📝 |
Medium |
| 695 |
max-area-of-island |
|
📝 |
Medium |
| 696 |
count-binary-substrings |
|
📝 |
Easy |
| 697 |
degree-of-an-array |
|
📝 |
Easy |
| 698 |
partition-to-k-equal-sum-subsets |
|
📝 |
Medium |
| 699 |
falling-squares |
|
📝 |
Hard |
| 711 |
number-of-distinct-islands-ii |
|
📝 |
Hard |
| 712 |
minimum-ascii-delete-sum-for-two-strings |
|
📝 |
Medium |
| 713 |
subarray-product-less-than-k |
|
📝 |
Medium |
| 714 |
best-time-to-buy-and-sell-stock-with-transaction-fee |
|
📝 |
Medium |
| 715 |
range-module |
|
📝 |
Hard |
| 716 |
max-stack |
|
📝 |
Easy |
| 717 |
1-bit-and-2-bit-characters |
|
📝 |
Easy |
| 718 |
maximum-length-of-repeated-subarray |
|
📝 |
Medium |
| 719 |
find-k-th-smallest-pair-distance |
|
📝 |
Hard |
| 720 |
longest-word-in-dictionary |
|
📝 |
Easy |
| 721 |
accounts-merge |
|
📝 |
Medium |
| 722 |
remove-comments |
|
📝 |
Medium |
| 723 |
candy-crush |
|
📝 |
Medium |
| 724 |
find-pivot-index |
|
📝 |
Easy |
| 725 |
split-linked-list-in-parts |
|
📝 |
Medium |
| 726 |
number-of-atoms |
|
📝 |
Hard |
| 727 |
minimum-window-subsequence |
|
📝 |
Hard |
| 728 |
self-dividing-numbers |
|
📝 |
Easy |
| 729 |
my-calendar-i |
|
📝 |
Medium |
| 730 |
count-different-palindromic-subsequences |
|
📝 |
Hard |
| 731 |
my-calendar-ii |
|
📝 |
Medium |
| 732 |
my-calendar-iii |
|
📝 |
Hard |
| 733 |
flood-fill |
|
📝 |
Easy |
| 734 |
sentence-similarity |
|
📝 |
Easy |
| 735 |
asteroid-collision |
|
📝 |
Medium |
| 736 |
parse-lisp-expression |
|
📝 |
Hard |
| 737 |
sentence-similarity-ii |
|
📝 |
Medium |
| 738 |
monotone-increasing-digits |
|
📝 |
Medium |
| 739 |
daily-temperatures |
|
📝 |
Medium |
| 740 |
delete-and-earn |
|
📝 |
Medium |
| 741 |
cherry-pickup |
|
📝 |
Hard |
| 742 |
to-lower-case |
|
|
Easy |
| 743 |
closest-leaf-in-a-binary-tree |
|
📝 |
Medium |
| 744 |
network-delay-time |
|
📝 |
Medium |
| 745 |
find-smallest-letter-greater-than-target |
|
📝 |
Easy |
| 746 |
prefix-and-suffix-search |
|
📝 |
Hard |
| 747 |
min-cost-climbing-stairs |
|
📝 |
Easy |
| 748 |
largest-number-at-least-twice-of-others |
|
📝 |
Easy |
| 749 |
shortest-completing-word |
|
📝 |
Easy |
| 750 |
contain-virus |
|
📝 |
Hard |
| 751 |
number-of-corner-rectangles |
|
📝 |
Medium |
| 752 |
ip-to-cidr |
|
📝 |
Easy |
| 753 |
open-the-lock |
|
📝 |
Medium |
| 754 |
cracking-the-safe |
|
📝 |
Hard |
| 755 |
reach-a-number |
|
📝 |
Easy |
| 756 |
pour-water |
|
📝 |
Medium |
| 757 |
pyramid-transition-matrix |
|
📝 |
Medium |
| 758 |
convert-binary-search-tree-to-sorted-doubly-linked-list |
|
📝 |
Medium |
| 759 |
set-intersection-size-at-least-two |
|
📝 |
Hard |
| 760 |
bold-words-in-string |
|
📝 |
Easy |
| 761 |
employee-free-time |
|
📝 |
Hard |
| 762 |
find-anagram-mappings |
|
📝 |
Easy |
| 763 |
special-binary-string |
|
📝 |
Hard |
| 764 |
n-ary-tree-level-order-traversal |
|
|
Easy |
| 765 |
serialize-and-deserialize-n-ary-tree |
|
|
Hard |
| 766 |
flatten-a-multilevel-doubly-linked-list |
|
|
Medium |
| 767 |
prime-number-of-set-bits-in-binary-representation |
|
📝 |
Easy |
| 768 |
partition-labels |
|
📝 |
Medium |
| 769 |
largest-plus-sign |
|
📝 |
Medium |
| 770 |
couples-holding-hands |
|
📝 |
Hard |
| 771 |
encode-n-ary-tree-to-binary-tree |
|
|
Hard |
| 772 |
construct-quad-tree |
|
|
Medium |
| 773 |
quad-tree-intersection |
|
|
Easy |
| 774 |
maximum-depth-of-n-ary-tree |
|
📝 |
Easy |
| 775 |
n-ary-tree-preorder-traversal |
|
📝 |
Easy |
| 776 |
n-ary-tree-postorder-traversal |
|
📝 |
Easy |
| 777 |
toeplitz-matrix |
|
📝 |
Easy |
| 778 |
reorganize-string |
|
📝 |
Medium |
| 779 |
max-chunks-to-make-sorted-ii |
|
📝 |
Hard |
| 780 |
max-chunks-to-make-sorted |
|
📝 |
Medium |
| 781 |
basic-calculator-iv |
|
📝 |
Hard |
| 782 |
jewels-and-stones |
|
📝 |
Easy |
| 783 |
search-in-a-binary-search-tree |
|
|
Easy |
| 784 |
insert-into-a-binary-search-tree |
|
📝 |
Medium |
| 785 |
basic-calculator-iii |
|
|
Hard |
| 786 |
search-in-a-sorted-array-of-unknown-size |
|
|
Medium |
| 787 |
sliding-puzzle |
|
📝 |
Hard |
| 788 |
minimize-max-distance-to-gas-station |
|
📝 |
Hard |
| 789 |
kth-largest-element-in-a-stream |
|
|
Easy |
| 790 |
global-and-local-inversions |
|
📝 |
Medium |
| 791 |
split-bst |
|
📝 |
Medium |
| 792 |
binary-search |
|
📝 |
Easy |
| 793 |
swap-adjacent-in-lr-string |
|
📝 |
Medium |
| 794 |
swim-in-rising-water |
|
📝 |
Hard |
| 795 |
k-th-symbol-in-grammar |
|
📝 |
Medium |
| 796 |
reaching-points |
|
📝 |
Hard |
| 797 |
rabbits-in-forest |
|
📝 |
Medium |
| 798 |
transform-to-chessboard |
|
📝 |
Hard |
| 799 |
minimum-distance-between-bst-nodes |
|
📝 |
Easy |
| 800 |
letter-case-permutation |
|
📝 |
Easy |
| 801 |
is-graph-bipartite |
|
📝 |
Medium |
| 802 |
k-th-smallest-prime-fraction |
|
📝 |
Hard |
| 803 |
cheapest-flights-within-k-stops |
|
📝 |
Medium |
| 804 |
rotated-digits |
|
📝 |
Easy |
| 805 |
escape-the-ghosts |
|
📝 |
Medium |
| 806 |
domino-and-tromino-tiling |
|
📝 |
Medium |
| 807 |
custom-sort-string |
|
📝 |
Medium |
| 808 |
number-of-matching-subsequences |
|
📝 |
Medium |
| 809 |
preimage-size-of-factorial-zeroes-function |
|
📝 |
Hard |
| 810 |
valid-tic-tac-toe-state |
|
📝 |
Medium |
| 811 |
number-of-subarrays-with-bounded-maximum |
|
📝 |
Medium |
| 812 |
rotate-string |
|
📝 |
Easy |
| 813 |
all-paths-from-source-to-target |
|
📝 |
Medium |
| 814 |
smallest-rotation-with-highest-score |
|
📝 |
Hard |
| 815 |
champagne-tower |
|
📝 |
Medium |
| 816 |
design-hashset |
|
|
Easy |
| 817 |
design-hashmap |
|
|
Easy |
| 818 |
similar-rgb-color |
|
📝 |
Easy |
| 819 |
minimum-swaps-to-make-sequences-increasing |
|
📝 |
Medium |
| 820 |
find-eventual-safe-states |
|
📝 |
Medium |
| 821 |
bricks-falling-when-hit |
|
📝 |
Hard |
| 822 |
unique-morse-code-words |
|
📝 |
Easy |
| 823 |
split-array-with-same-average |
|
📝 |
Hard |
| 824 |
number-of-lines-to-write-string |
|
📝 |
Easy |
| 825 |
max-increase-to-keep-city-skyline |
|
📝 |
Medium |
| 826 |
soup-servings |
|
📝 |
Medium |
| 827 |
expressive-words |
|
📝 |
Medium |
| 828 |
chalkboard-xor-game |
|
📝 |
Hard |
| 829 |
subdomain-visit-count |
|
📝 |
Easy |
| 830 |
largest-triangle-area |
|
📝 |
Easy |
| 831 |
largest-sum-of-averages |
|
📝 |
Medium |
| 832 |
binary-tree-pruning |
|
📝 |
Medium |
| 833 |
bus-routes |
|
📝 |
Hard |
| 834 |
ambiguous-coordinates |
|
📝 |
Medium |
| 835 |
linked-list-components |
|
📝 |
Medium |
| 836 |
race-car |
|
📝 |
Hard |
| 837 |
most-common-word |
|
📝 |
Easy |
| 838 |
design-linked-list |
|
|
Easy |
| 839 |
short-encoding-of-words |
|
📝 |
Medium |
| 841 |
shortest-distance-to-a-character |
|
📝 |
Easy |
| 842 |
card-flipping-game |
|
📝 |
Medium |
| 843 |
binary-trees-with-factors |
|
📝 |
Medium |
| 850 |
insert-into-a-cyclic-sorted-list |
|
|
Medium |
| 851 |
goat-latin |
|
📝 |
Easy |
| 852 |
friends-of-appropriate-ages |
|
📝 |
Medium |
| 853 |
most-profit-assigning-work |
|
📝 |
Medium |
| 854 |
making-a-large-island |
|
📝 |
Hard |
| 855 |
unique-letter-string |
|
📝 |
Hard |
| 856 |
consecutive-numbers-sum |
|
📝 |
Hard |
| 857 |
positions-of-large-groups |
|
📝 |
Easy |
| 858 |
masking-personal-information |
|
📝 |
Medium |
| 859 |
design-circular-deque |
|
|
Medium |
| 860 |
design-circular-queue |
|
|
Medium |
| 861 |
flipping-an-image |
|
📝 |
Easy |
| 862 |
find-and-replace-in-string |
|
📝 |
Medium |
| 863 |
sum-of-distances-in-tree |
|
📝 |
Hard |
| 864 |
image-overlap |
|
📝 |
Medium |
| 865 |
robot-room-cleaner |
|
📝 |
Hard |
| 866 |
rectangle-overlap |
|
📝 |
Easy |
| 867 |
new-21-game |
|
📝 |
Medium |
| 868 |
push-dominoes |
|
📝 |
Medium |
| 869 |
similar-string-groups |
|
📝 |
Hard |
| 870 |
magic-squares-in-grid |
|
📝 |
Easy |
| 871 |
keys-and-rooms |
|
📝 |
Medium |
| 872 |
split-array-into-fibonacci-sequence |
|
📝 |
Medium |
| 873 |
guess-the-word |
|
📝 |
Hard |
| 874 |
backspace-string-compare |
|
📝 |
Easy |
| 875 |
longest-mountain-in-array |
|
📝 |
Medium |
| 876 |
hand-of-straights |
|
📝 |
Medium |
| 877 |
shortest-path-visiting-all-nodes |
|
📝 |
Hard |
| 878 |
shifting-letters |
|
📝 |
Medium |
| 879 |
maximize-distance-to-closest-person |
|
📝 |
Easy |
| 880 |
rectangle-area-ii |
|
📝 |
Hard |
| 881 |
loud-and-rich |
|
📝 |
Medium |
| 882 |
peak-index-in-a-mountain-array |
|
📝 |
Easy |
| 883 |
car-fleet |
|
📝 |
Medium |
| 884 |
k-similar-strings |
|
📝 |
Hard |
| 885 |
exam-room |
|
📝 |
Medium |
| 886 |
score-of-parentheses |
|
📝 |
Medium |
| 887 |
minimum-cost-to-hire-k-workers |
|
📝 |
Hard |
| 888 |
mirror-reflection |
|
📝 |
Medium |
| 889 |
buddy-strings |
|
📝 |
Easy |
| 890 |
lemonade-change |
|
📝 |
Easy |
| 891 |
score-after-flipping-matrix |
|
📝 |
Medium |
| 892 |
shortest-subarray-with-sum-at-least-k |
|
📝 |
Hard |
| 893 |
all-nodes-distance-k-in-binary-tree |
|
📝 |
Medium |
| 894 |
random-pick-with-blacklist |
|
📝 |
Hard |
| 895 |
shortest-path-to-get-all-keys |
|
📝 |
Hard |
| 896 |
smallest-subtree-with-all-the-deepest-nodes |
|
📝 |
Medium |
| 897 |
prime-palindrome |
|
📝 |
Medium |
| 898 |
transpose-matrix |
|
📝 |
Easy |
| 899 |
binary-gap |
|
📝 |
Easy |
| 900 |
reordered-power-of-2 |
|
📝 |
Medium |
| 901 |
advantage-shuffle |
|
📝 |
Medium |
| 902 |
minimum-number-of-refueling-stops |
|
📝 |
Hard |
| 903 |
implement-rand10-using-rand7 |
|
📝 |
Medium |
| 904 |
leaf-similar-trees |
|
📝 |
Easy |
| 905 |
length-of-longest-fibonacci-subsequence |
|
📝 |
Medium |
| 906 |
walking-robot-simulation |
|
📝 |
Easy |
| 907 |
koko-eating-bananas |
|
📝 |
Medium |
| 908 |
middle-of-the-linked-list |
|
📝 |
Easy |
| 909 |
stone-game |
|
📝 |
Medium |
| 910 |
nth-magical-number |
|
📝 |
Hard |
| 911 |
profitable-schemes |
|
📝 |
Hard |
| 912 |
random-pick-with-weight |
|
📝 |
Medium |
| 913 |
random-flip-matrix |
|
📝 |
Medium |
| 914 |
random-point-in-non-overlapping-rectangles |
|
📝 |
Medium |
| 915 |
generate-random-point-in-a-circle |
|
📝 |
Medium |
| 916 |
decoded-string-at-index |
|
📝 |
Medium |
| 917 |
boats-to-save-people |
|
📝 |
Medium |
| 918 |
reachable-nodes-in-subdivided-graph |
|
📝 |
Hard |
| 919 |
projection-area-of-3d-shapes |
|
📝 |
Easy |
| 920 |
uncommon-words-from-two-sentences |
|
📝 |
Easy |
| 921 |
spiral-matrix-iii |
|
📝 |
Medium |
| 922 |
possible-bipartition |
|
📝 |
Medium |
| 923 |
super-egg-drop |
|
📝 |
Hard |
| 924 |
fair-candy-swap |
|
📝 |
Easy |
| 925 |
construct-binary-tree-from-preorder-and-postorder-traversal |
|
📝 |
Medium |
| 926 |
find-and-replace-pattern |
|
📝 |
Medium |
| 927 |
sum-of-subsequence-widths |
|
📝 |
Hard |
| 928 |
surface-area-of-3d-shapes |
|
📝 |
Easy |
| 929 |
groups-of-special-equivalent-strings |
|
📝 |
Easy |
| 930 |
all-possible-full-binary-trees |
|
📝 |
Medium |
| 931 |
maximum-frequency-stack |
|
📝 |
Hard |
| 932 |
monotonic-array |
|
📝 |
Easy |
| 933 |
increasing-order-search-tree |
|
📝 |
Easy |
| 934 |
bitwise-ors-of-subarrays |
|
📝 |
Medium |
| 935 |
orderly-queue |
|
📝 |
Hard |
| 936 |
rle-iterator |
|
📝 |
Medium |
| 937 |
online-stock-span |
|
📝 |
Medium |
| 938 |
numbers-at-most-n-given-digit-set |
|
📝 |
Hard |
| 939 |
valid-permutations-for-di-sequence |
|
📝 |
Hard |
| 940 |
fruit-into-baskets |
|
📝 |
Medium |
| 941 |
sort-array-by-parity |
|
📝 |
Easy |
| 942 |
super-palindromes |
|
📝 |
Hard |
| 943 |
sum-of-subarray-minimums |
|
📝 |
Medium |
| 944 |
smallest-range-i |
|
📝 |
Easy |
| 945 |
snakes-and-ladders |
|
📝 |
Medium |
| 946 |
smallest-range-ii |
|
📝 |
Medium |
| 947 |
online-election |
|
📝 |
Medium |
| 948 |
sort-an-array |
|
|
Medium |
| 949 |
cat-and-mouse |
|
📝 |
Hard |
| 950 |
x-of-a-kind-in-a-deck-of-cards |
|
📝 |
Easy |
| 951 |
partition-array-into-disjoint-intervals |
|
📝 |
Medium |
| 952 |
word-subsets |
|
📝 |
Medium |
| 953 |
reverse-only-letters |
|
📝 |
Easy |
| 954 |
maximum-sum-circular-subarray |
|
📝 |
Medium |
| 955 |
complete-binary-tree-inserter |
|
📝 |
Medium |
| 956 |
number-of-music-playlists |
|
📝 |
Hard |
| 957 |
minimum-add-to-make-parentheses-valid |
|
📝 |
Medium |
| 958 |
sort-array-by-parity-ii |
|
📝 |
Easy |
| 959 |
3sum-with-multiplicity |
|
📝 |
Medium |
| 960 |
minimize-malware-spread |
|
📝 |
Hard |
| 961 |
long-pressed-name |
|
📝 |
Easy |
| 962 |
flip-string-to-monotone-increasing |
|
📝 |
Medium |
| 963 |
three-equal-parts |
|
📝 |
Hard |
| 964 |
minimize-malware-spread-ii |
|
📝 |
Hard |
| 965 |
unique-email-addresses |
|
📝 |
Easy |
| 966 |
binary-subarrays-with-sum |
|
📝 |
Medium |
| 967 |
minimum-falling-path-sum |
|
📝 |
Medium |
| 968 |
beautiful-array |
|
📝 |
Medium |
| 969 |
number-of-recent-calls |
|
📝 |
Easy |
| 971 |
shortest-bridge |
|
📝 |
Medium |
| 972 |
knight-dialer |
|
📝 |
Medium |
| 973 |
stamping-the-sequence |
|
📝 |
Hard |
| 974 |
reorder-log-files |
|
📝 |
Easy |
| 975 |
range-sum-of-bst |
|
📝 |
Easy |
| 976 |
minimum-area-rectangle |
|
📝 |
Medium |
| 977 |
distinct-subsequences-ii |
|
📝 |
Hard |
| 978 |
valid-mountain-array |
|
📝 |
Easy |
| 979 |
di-string-match |
|
📝 |
Easy |
| 980 |
find-the-shortest-superstring |
|
📝 |
Hard |
| 981 |
delete-columns-to-make-sorted |
|
📝 |
Easy |
| 982 |
minimum-increment-to-make-array-unique |
|
📝 |
Medium |
| 983 |
validate-stack-sequences |
|
📝 |
Medium |
| 984 |
most-stones-removed-with-same-row-or-column |
|
📝 |
Medium |
| 985 |
bag-of-tokens |
|
📝 |
Medium |
| 986 |
largest-time-for-given-digits |
|
📝 |
Easy |
| 987 |
reveal-cards-in-increasing-order |
|
📝 |
Medium |
| 988 |
flip-equivalent-binary-trees |
|
📝 |
Medium |
| 989 |
largest-component-size-by-common-factor |
|
📝 |
Hard |
| 990 |
verifying-an-alien-dictionary |
|
📝 |
Easy |
| 991 |
array-of-doubled-pairs |
|
📝 |
Medium |
| 992 |
delete-columns-to-make-sorted-ii |
|
📝 |
Medium |
| 993 |
tallest-billboard |
|
📝 |
Hard |
| 994 |
prison-cells-after-n-days |
|
📝 |
Medium |
| 998 |
check-completeness-of-a-binary-tree |
|
📝 |
Medium |
| 999 |
regions-cut-by-slashes |
|
📝 |
Medium |
| 1000 |
delete-columns-to-make-sorted-iii |
|
📝 |
Hard |
| 1001 |
n-repeated-element-in-size-2n-array |
|
📝 |
Easy |
| 1002 |
maximum-width-ramp |
|
📝 |
Medium |
| 1003 |
minimum-area-rectangle-ii |
|
📝 |
Medium |
| 1004 |
least-operators-to-express-number |
|
📝 |
Hard |
| 1005 |
univalued-binary-tree |
|
📝 |
Easy |
| 1006 |
vowel-spellchecker |
|
📝 |
Medium |
| 1007 |
numbers-with-same-consecutive-differences |
|
📝 |
Medium |
| 1008 |
binary-tree-cameras |
|
📝 |
Hard |
| 1009 |
pancake-sorting |
|
📝 |
Medium |
| 1010 |
powerful-integers |
|
📝 |
Easy |
| 1011 |
flip-binary-tree-to-match-preorder-traversal |
|
📝 |
Medium |
| 1012 |
equal-rational-numbers |
|
📝 |
Hard |
| 1013 |
fibonacci-number |
|
📝 |
Easy |
| 1014 |
k-closest-points-to-origin |
|
📝 |
Medium |
| 1016 |
subarray-sums-divisible-by-k |
|
📝 |
Medium |
| 1017 |
odd-even-jump |
|
📝 |
Hard |
| 1018 |
largest-perimeter-triangle |
|
📝 |
Easy |
| 1019 |
squares-of-a-sorted-array |
|
📝 |
Easy |
| 1020 |
longest-turbulent-subarray |
|
📝 |
Medium |
| 1021 |
distribute-coins-in-binary-tree |
|
📝 |
Medium |
| 1022 |
unique-paths-iii |
|
📝 |
Hard |
| 1023 |
time-based-key-value-store |
|
📝 |
Medium |
| 1024 |
triples-with-bitwise-and-equal-to-zero |
|
|
Hard |
| 1025 |
minimum-cost-for-tickets |
|
📝 |
Medium |
| 1026 |
string-without-aaa-or-bbb |
|
📝 |
Medium |
| 1027 |
sum-of-even-numbers-after-queries |
|
📝 |
Easy |
| 1028 |
interval-list-intersections |
|
📝 |
Medium |
| 1029 |
vertical-order-traversal-of-a-binary-tree |
|
📝 |
Medium |
| 1030 |
smallest-string-starting-from-leaf |
|
📝 |
Medium |
| 1031 |
add-to-array-form-of-integer |
|
📝 |
Easy |
| 1032 |
satisfiability-of-equality-equations |
|
📝 |
Medium |
| 1033 |
broken-calculator |
|
📝 |
Medium |
| 1034 |
subarrays-with-k-different-integers |
|
📝 |
Hard |
| 1035 |
cousins-in-binary-tree |
|
📝 |
Easy |
| 1036 |
rotting-oranges |
|
📝 |
Easy |
| 1037 |
minimum-number-of-k-consecutive-bit-flips |
|
📝 |
Hard |
| 1038 |
number-of-squareful-arrays |
|
📝 |
Hard |
| 1039 |
find-the-town-judge |
|
|
Easy |
| 1040 |
maximum-binary-tree-ii |
|
|
Medium |
| 1041 |
available-captures-for-rook |
|
|
Easy |
| 1042 |
minimum-cost-to-merge-stones |
|
|
Hard |
| 1043 |
grid-illumination |
|
|
Hard |
| 1044 |
find-common-characters |
|
|
Easy |
| 1045 |
check-if-word-is-valid-after-substitutions |
|
|
Medium |
| 1046 |
max-consecutive-ones-iii |
|
|
Medium |
| 1047 |
maximize-sum-of-array-after-k-negations |
|
|
Easy |
| 1048 |
clumsy-factorial |
|
|
Medium |
| 1049 |
minimum-domino-rotations-for-equal-row |
|
📝 |
Medium |
| 1050 |
construct-binary-search-tree-from-preorder-traversal |
|
📝 |
Medium |
| 1051 |
shortest-way-to-form-string |
|
|
Medium |
| 1052 |
campus-bikes |
|
|
Medium |
| 1053 |
minimize-rounding-error-to-meet-target |
|
|
Medium |
| 1054 |
complement-of-base-10-integer |
|
|
Easy |
| 1055 |
pairs-of-songs-with-total-durations-divisible-by-60 |
|
|
Easy |
| 1056 |
capacity-to-ship-packages-within-d-days |
|
|
Medium |
| 1057 |
numbers-with-repeated-digits |
|
|
Hard |
| 1058 |
lexicographically-smallest-equivalent-string |
|
|
Medium |
| 1059 |
missing-element-in-sorted-array |
|
📝 |
Medium |
| 1060 |
longest-repeating-substring |
|
📝 |
Medium |
| 1061 |
number-of-valid-subarrays |
|
|
Hard |
| 1062 |
partition-array-into-three-parts-with-equal-sum |
|
|
Easy |
| 1063 |
best-sightseeing-pair |
|
|
Medium |
| 1064 |
smallest-integer-divisible-by-k |
|
|
Medium |
| 1065 |
binary-string-with-substrings-representing-1-to-n |
|
|
Medium |
| 1066 |
fixed-point |
|
|
Easy |
| 1067 |
campus-bikes-ii |
|
|
Medium |
| 1068 |
digit-count-in-range |
|
|
Hard |
| 1069 |
confusing-number |
|
|
Easy |
| 1070 |
convert-to-base-2 |
|
|
Medium |
| 1071 |
binary-prefix-divisible-by-5 |
|
|
Easy |
| 1072 |
next-greater-node-in-linked-list |
|
|
Medium |
| 1073 |
number-of-enclaves |
|
|
Medium |
| 1074 |
high-five |
|
|
Easy |
| 1075 |
index-pairs-of-a-string |
|
|
Easy |
| 1076 |
brace-expansion |
|
|
Medium |
| 1077 |
confusing-number-ii |
|
|
Hard |
| 1078 |
remove-outermost-parentheses |
|
|
Easy |
| 1079 |
sum-of-root-to-leaf-binary-numbers |
|
|
Easy |
| 1080 |
camelcase-matching |
|
|
Medium |
| 1081 |
video-stitching |
|
|
Medium |
| 1082 |
sum-of-digits-in-the-minimum-number |
|
|
Easy |
| 1083 |
two-sum-less-than-k |
|
|
Easy |
| 1084 |
find-k-length-substrings-with-no-repeated-characters |
|
|
Medium |
| 1085 |
the-earliest-moment-when-everyone-become-friends |
|
|
Medium |
| 1086 |
divisor-game |
|
|
Easy |
| 1087 |
longest-arithmetic-sequence |
|
|
Medium |
| 1088 |
number-of-days-in-a-month |
|
|
Easy |
| 1089 |
remove-vowels-from-a-string |
|
|
Easy |
| 1090 |
armstrong-number |
|
|
Easy |
| 1091 |
maximum-average-subtree |
|
|
Medium |
| 1092 |
maximum-difference-between-node-and-ancestor |
|
|
Medium |
| 1093 |
recover-a-tree-from-preorder-traversal |
|
|
Hard |
| 1094 |
matrix-cells-in-distance-order |
|
|
Easy |
| 1095 |
two-city-scheduling |
|
📝 |
Easy |
| 1096 |
maximum-sum-of-two-non-overlapping-subarrays |
|
|
Medium |
| 1097 |
stream-of-characters |
|
|
Hard |
| 1098 |
largest-unique-number |
|
|
Easy |
| 1099 |
path-with-maximum-minimum-value |
|
|
Medium |
| 1100 |
connecting-cities-with-minimum-cost |
|
|
Medium |
| 1101 |
parallel-courses |
|
|
Hard |
| 1102 |
check-if-a-number-is-majority-element-in-a-sorted-array |
|
|
Easy |
| 1103 |
moving-stones-until-consecutive |
|
|
Easy |
| 1104 |
coloring-a-border |
|
|
Medium |
| 1105 |
uncrossed-lines |
|
|
Medium |
| 1106 |
escape-a-large-maze |
|
|
Hard |
| 1107 |
minimum-swaps-to-group-all-1s-together |
|
|
Medium |
| 1108 |
analyze-user-website-visit-pattern |
|
|
Medium |
| 1111 |
minimum-score-triangulation-of-polygon |
|
|
Medium |
| 1112 |
find-words-that-can-be-formed-by-characters |
|
|
Easy |
| 1113 |
moving-stones-until-consecutive-ii |
|
|
Medium |
| 1114 |
binary-search-tree-to-greater-sum-tree |
|
|
Medium |
| 1115 |
valid-boomerang |
|
|
Easy |
| 1116 |
maximum-level-sum-of-a-binary-tree |
|
|
Medium |
| 1117 |
as-far-from-land-as-possible |
|
|
Medium |
| 1118 |
divide-array-into-increasing-sequences |
|
|
Hard |
| 1119 |
robot-bounded-in-circle |
|
|
Medium |
| 1120 |
flower-planting-with-no-adjacent |
|
|
Easy |
| 1121 |
partition-array-for-maximum-sum |
|
|
Medium |
| 1122 |
longest-duplicate-substring |
|
📝 |
Hard |
| 1124 |
string-transforms-into-another-string |
|
|
Hard |
| 1127 |
last-stone-weight |
|
|
Easy |
| 1128 |
remove-all-adjacent-duplicates-in-string |
|
📝 |
Easy |
| 1129 |
longest-string-chain |
|
|
Medium |
| 1130 |
last-stone-weight-ii |
|
|
Medium |
| 1133 |
last-substring-in-lexicographical-order |
|
|
Hard |
| 1137 |
height-checker |
|
|
Easy |
| 1138 |
grumpy-bookstore-owner |
|
|
Medium |
| 1139 |
previous-permutation-with-one-swap |
|
|
Medium |
| 1140 |
distant-barcodes |
|
|
Medium |