001 |
Two Sum |
easy |
0.441 |
c |
002 |
Add Two Numbers |
medium |
0.311 |
c |
003 |
Longest Substring Without Repeating Characters |
medium |
0.283 |
c |
005 |
Longest Palindromic Substring |
medium |
0.272 |
c |
006 |
ZigZag Conversion |
medium |
0.318 |
c |
007 |
Reverse Integer |
easy |
0.253 |
c |
008 |
String to Integer (atoi) |
medium |
0.146 |
c |
009 |
Palindrome Number |
easy |
0.433 |
c |
011 |
Container With Most Water |
medium |
0.445 |
c |
012 |
Integer to Roman |
medium |
0.509 |
c |
013 |
Roman to Integer |
easy |
0.523 |
c |
014 |
Longest Common Prefix |
easy |
0.335 |
c |
015 |
3Sum |
medium |
0.239 |
c |
016 |
3Sum Closest |
medium |
0.457 |
c |
017 |
Letter Combinations of a Phone Number |
medium |
0.415 |
c |
019 |
Remove Nth Node From End of List |
medium |
0.342 |
c |
020 |
Valid Parentheses |
easy |
0.365 |
c |
021 |
Merge Two Sorted Lists |
easy |
0.472 |
c |
022 |
Generate Parentheses |
medium |
0.548 |
c |
023 |
Merge k Sorted Lists |
hard |
0.344 |
c |
024 |
Swap Nodes in Pairs |
medium |
0.446 |
c |
026 |
Remove Duplicates from Sorted Array |
easy |
0.406 |
c |
027 |
Remove Element |
easy |
0.445 |
c |
028 |
Implement strStr() |
easy |
0.319 |
c |
031 |
Next Permutation |
medium |
0.304 |
c |
032 |
Longest Valid Parentheses |
hard |
0.254 |
c |
033 |
Search in Rotated Sorted Array |
medium |
0.328 |
c |
034 |
Find First and Last Position of Element in Sorted Array |
medium |
0.335 |
c |
035 |
Search Insert Position |
easy |
0.408 |
c |
036 |
Valid Sudoku |
medium |
0.430 |
c |
037 |
Sudoku Solver |
hard |
0.369 |
c |
038 |
Count and Say |
easy |
0.404 |
c |
039 |
Combination Sum |
medium |
0.484 |
c |
040 |
Combination Sum II |
medium |
0.415 |
c |
041 |
First Missing Positive |
hard |
0.288 |
c |
042 |
Trapping Rain Water |
hard |
0.431 |
c |
043 |
Multiply Strings |
medium |
0.306 |
c |
046 |
Permutations |
medium |
0.551 |
c |
047 |
Permutations II |
medium |
0.404 |
c |
048 |
Rotate Image |
medium |
0.484 |
c |
049 |
Group Anagrams |
medium |
0.467 |
c |
050 |
Pow(x, n) |
medium |
0.279 |
c |
051 |
N-Queens |
hard |
0.392 |
c |
052 |
N-Queens II |
hard |
0.519 |
c |
053 |
Maximum Subarray |
easy |
0.435 |
c |
054 |
Spiral Matrix |
medium |
0.304 |
c |
055 |
Jump Game |
medium |
0.318 |
c |
056 |
Merge Intervals |
medium |
0.356 |
c |
058 |
Length of Last Word |
easy |
0.322 |
c |
059 |
Spiral Matrix II |
medium |
0.465 |
c |
060 |
Permutation Sequence |
medium |
0.330 |
c |
062 |
Unique Paths |
medium |
0.475 |
c |
063 |
Unique Paths II |
medium |
0.334 |
c |
064 |
Minimum Path Sum |
medium |
0.468 |
c |
065 |
Valid Number |
hard |
0.139 |
c |
066 |
Plus One |
easy |
0.412 |
c |
067 |
Add Binary |
easy |
0.391 |
c |
069 |
Sqrt(x) |
easy |
0.313 |
c |
070 |
Climbing Stairs |
easy |
0.441 |
c |
071 |
Simplify Path |
medium |
0.287 |
c |
073 |
Set Matrix Zeroes |
medium |
0.397 |
c |
074 |
Search a 2D Matrix |
medium |
0.348 |
c |
075 |
Sort Colors |
medium |
0.421 |
c |
076 |
Minimum Window Substring |
hard |
0.307 |
c |
077 |
Combinations |
medium |
0.476 |
c |
078 |
Subsets |
medium |
0.527 |
c |
079 |
Word Search |
medium |
0.312 |
c |
080 |
Remove Duplicates from Sorted Array II |
medium |
0.403 |
c |
081 |
Search in Rotated Sorted Array II |
medium |
0.326 |
c |
085 |
Maximal Rectangle |
hard |
0.333 |
c |
088 |
Merge Sorted Array |
easy |
0.357 |
c |
089 |
Gray Code |
medium |
0.457 |
c |
091 |
Decode Ways |
medium |
0.223 |
c |
093 |
Restore IP Addresses |
medium |
0.314 |
c |
100 |
Same Tree |
easy |
0.500 |
c |
118 |
Pascal's Triangle |
easy |
0.459 |
c |
119 |
Pascal's Triangle II |
easy |
0.435 |
c |
120 |
Triangle |
medium |
0.393 |
c |
121 |
Best Time to Buy and Sell Stock |
easy |
0.472 |
c |
122 |
Best Time to Buy and Sell Stock II |
easy |
0.518 |
c |
125 |
Valid Palindrome |
easy |
0.310 |
c |
130 |
Surrounded Regions |
medium |
0.228 |
c |
131 |
Palindrome Partitioning |
medium |
0.408 |
c |
134 |
Gas Station |
medium |
0.337 |
c |
136 |
Single Number |
easy |
0.601 |
c |
137 |
Single Number II |
medium |
0.459 |
c |
139 |
Word Break |
medium |
0.352 |
c |
140 |
Word Break II |
hard |
0.272 |
c |
150 |
Evaluate Reverse Polish Notation |
medium |
0.321 |
c |
151 |
Reverse Words in a String |
medium |
0.167 |
c |
152 |
Maximum Product Subarray |
medium |
0.292 |
c |
153 |
Find Minimum in Rotated Sorted Array |
medium |
0.429 |
c |
154 |
Find Minimum in Rotated Sorted Array II |
hard |
0.393 |
c |
165 |
Compare Version Numbers |
medium |
0.235 |
c |
166 |
Fraction to Recurring Decimal |
medium |
0.194 |
c |
167 |
Two Sum II - Input array is sorted |
easy |
0.503 |
c |
168 |
Excel Sheet Column Title |
easy |
0.289 |
c |
169 |
Majority Element |
easy |
0.526 |
c |
171 |
Excel Sheet Column Number |
easy |
0.514 |
c |
172 |
Factorial Trailing Zeroes |
easy |
0.373 |
c |
174 |
Dungeon Game |
hard |
0.270 |
c |
187 |
Repeated DNA Sequences |
medium |
0.360 |
c |
189 |
Rotate Array |
easy |
0.300 |
c |
190 |
Reverse Bits |
easy |
0.313 |
c |
191 |
Number of 1 Bits |
easy |
0.431 |
c |
198 |
House Robber |
easy |
0.410 |
c |
200 |
Number of Islands |
medium |
0.414 |
c |
201 |
Bitwise AND of Numbers Range |
medium |
0.358 |
c |
202 |
Happy Number |
easy |
0.451 |
c |
204 |
Count Primes |
easy |
0.289 |
c |
205 |
Isomorphic Strings |
easy |
0.373 |
c |
206 |
Reverse Linked List |
easy |
0.546 |
c |
209 |
Minimum Size Subarray Sum |
medium |
0.348 |
c |
212 |
Word Search II |
hard |
0.286 |
c |
213 |
House Robber II |
medium |
0.352 |
c |
214 |
Shortest Palindrome |
hard |
0.275 |
c |
215 |
Kth Largest Element in an Array |
medium |
0.477 |
c |
216 |
Combination Sum III |
medium |
0.515 |
c |
217 |
Contains Duplicate |
easy |
0.519 |
c |
219 |
Contains Duplicate II |
easy |
0.352 |
c |
220 |
Contains Duplicate III |
medium |
0.197 |
c |
221 |
Maximal Square |
medium |
0.330 |
c |
223 |
Rectangle Area |
medium |
0.358 |
c |
227 |
Basic Calculator II |
medium |
0.334 |
c |
229 |
Majority Element II |
medium |
0.320 |
c |
231 |
Power of Two |
easy |
0.419 |
c |
240 |
Search a 2D Matrix II |
medium |
0.408 |
c |
242 |
Valid Anagram |
easy |
0.521 |
c |
258 |
Add Digits |
easy |
0.540 |
c |
263 |
Ugly Number |
easy |
0.405 |
c |
268 |
Missing Number |
easy |
0.483 |
c |
274 |
H-Index |
medium |
0.345 |
c |
278 |
First Bad Version |
easy |
0.299 |
c |
279 |
Perfect Squares |
medium |
0.419 |
c |
282 |
Expression Add Operators |
hard |
0.327 |
c |
283 |
Move Zeroes |
easy |
0.542 |
c |
287 |
Find the Duplicate Number |
medium |
0.495 |
c |
289 |
Game of Life |
medium |
0.453 |
c |
292 |
Nim Game |
easy |
0.556 |
c |
299 |
Bulls and Cows |
medium |
0.394 |
c |
303 |
Range Sum Query - Immutable |
easy |
0.379 |
c |
313 |
Super Ugly Number |
medium |
0.413 |
c |
319 |
Bulb Switcher |
medium |
0.439 |
c |
326 |
Power of Three |
easy |
0.416 |
c |
338 |
Counting Bits |
medium |
0.646 |
c |
344 |
Reverse String |
easy |
0.632 |
c |
349 |
Intersection of Two Arrays |
easy |
0.545 |
c |
350 |
Intersection of Two Arrays II |
easy |
0.477 |
c |
371 |
Sum of Two Integers |
easy |
0.509 |
c |
377 |
Combination Sum IV |
medium |
0.437 |
c |
383 |
Ransom Note |
easy |
0.498 |
c |
387 |
First Unique Character in a String |
easy |
0.500 |
c |
389 |
Find the Difference |
easy |
0.530 |
c |
392 |
Is Subsequence |
medium |
0.467 |
c |
401 |
Binary Watch |
easy |
0.453 |
c |
409 |
Longest Palindrome |
easy |
0.480 |
c |
412 |
Fizz Buzz |
easy |
0.595 |
c |
414 |
Third Maximum Number |
easy |
0.289 |
c |
415 |
Add Strings |
easy |
0.436 |
c |
434 |
Number of Segments in a String |
easy |
0.369 |
c |
438 |
Find All Anagrams in a String |
easy |
0.372 |
c |
442 |
Find All Duplicates in an Array |
medium |
0.608 |
c |
443 |
String Compression |
easy |
0.376 |
c |
447 |
Number of Boomerangs |
easy |
0.498 |
c |
448 |
Find All Numbers Disappeared in an Array |
easy |
0.533 |
c |
451 |
Sort Characters By Frequency |
medium |
0.560 |
c |
452 |
Minimum Number of Arrows to Burst Balloons |
medium |
0.463 |
c |
453 |
Minimum Moves to Equal Array Elements |
easy |
0.491 |
c |
456 |
132 Pattern |
medium |
0.273 |
c |
459 |
Repeated Substring Pattern |
easy |
0.398 |
c |
461 |
Hamming Distance |
easy |
0.703 |
c |
462 |
Minimum Moves to Equal Array Elements II |
medium |
0.523 |
c |
463 |
Island Perimeter |
easy |
0.609 |
c |
473 |
Matchsticks to Square |
medium |
0.358 |
c |
474 |
Ones and Zeroes |
medium |
0.397 |
c |
475 |
Heaters |
easy |
0.317 |
c |
476 |
Number Complement |
easy |
0.623 |
c |
483 |
Smallest Good Base |
hard |
0.341 |
c |
485 |
Max Consecutive Ones |
easy |
0.550 |
c |
486 |
Predict the Winner |
medium |
0.467 |
c |
492 |
Construct the Rectangle |
easy |
0.486 |
c |
494 |
Target Sum |
medium |
0.452 |
c |
495 |
Teemo Attacking |
medium |
0.522 |
c |
496 |
Next Greater Element I |
easy |
0.595 |
c |
498 |
Diagonal Traverse |
medium |
0.453 |
c |
500 |
Keyboard Row |
easy |
0.621 |
c |
504 |
Base 7 |
easy |
0.449 |
c |
507 |
Perfect Number |
easy |
0.342 |
c |
520 |
Detect Capital |
easy |
0.524 |
c |
521 |
Longest Uncommon Subsequence I |
easy |
0.563 |
c |
530 |
Minimum Absolute Difference in BST |
easy |
0.504 |
c |
532 |
K-diff Pairs in an Array |
easy |
0.298 |
c |
535 |
Encode and Decode TinyURL |
medium |
0.767 |
c |
541 |
Reverse String II |
easy |
0.454 |
c |
542 |
01 Matrix |
medium |
0.356 |
c |
551 |
Student Attendance Record I |
easy |
0.452 |
c |
556 |
Next Greater Element III |
medium |
0.299 |
c |
557 |
Reverse Words in a String III |
easy |
0.640 |
c |
561 |
Array Partition I |
easy |
0.689 |
c |
566 |
Reshape the Matrix |
easy |
0.588 |
c |
575 |
Distribute Candies |
easy |
0.596 |
c |
598 |
Range Addition II |
easy |
0.486 |
c |
605 |
Can Place Flowers |
easy |
0.308 |
c |
617 |
Merge Two Binary Trees |
easy |
0.701 |
c |
628 |
Maximum Product of Three Numbers |
easy |
0.459 |
c |
633 |
Sum of Square Numbers |
easy |
0.327 |
c |
639 |
Decode Ways II |
hard |
0.250 |
c |
650 |
2 Keys Keyboard |
medium |
0.465 |
c |
657 |
Robot Return to Origin |
easy |
0.714 |
c |
661 |
Image Smoother |
easy |
0.487 |
c |
665 |
Non-decreasing Array |
easy |
0.194 |
c |
674 |
Longest Continuous Increasing Subsequence |
easy |
0.442 |
c |
679 |
24 Game |
hard |
0.427 |
c |
680 |
Valid Palindrome II |
easy |
0.341 |
c |
682 |
Baseball Game |
easy |
0.609 |
c |
688 |
Knight Probability in Chessboard |
medium |
0.443 |
c |
693 |
Binary Number with Alternating Bits |
easy |
0.578 |
c |
695 |
Max Area of Island |
medium |
0.571 |
c |
696 |
Count Binary Substrings |
easy |
0.533 |
c |
697 |
Degree of an Array |
easy |
0.503 |
c |
717 |
1-bit and 2-bit Characters |
easy |
0.492 |
c |
718 |
Maximum Length of Repeated Subarray |
medium |
0.459 |
c |
728 |
Self Dividing Numbers |
easy |
0.700 |
c |
733 |
Flood Fill |
easy |
0.507 |
c |
739 |
Daily Temperatures |
medium |
0.599 |
c |
709 |
To Lower Case |
easy |
0.768 |
c |
744 |
Find Smallest Letter Greater Than Target |
easy |
0.440 |
c |
746 |
Min Cost Climbing Stairs |
easy |
0.471 |
c |
747 |
Largest Number At Least Twice of Others |
easy |
0.405 |
c |
753 |
Cracking the Safe |
hard |
0.461 |
c |
754 |
Reach a Number |
easy |
0.325 |
c |
762 |
Prime Number of Set Bits in Binary Representation |
easy |
0.591 |
c |
763 |
Partition Labels |
medium |
0.702 |
c |
764 |
Largest Plus Sign |
medium |
0.433 |
c |
766 |
Toeplitz Matrix |
easy |
0.617 |
c |
771 |
Jewels and Stones |
easy |
0.830 |
c |
700 |
Search in a Binary Search Tree |
easy |
0.680 |
c |
701 |
Insert into a Binary Search Tree |
medium |
0.757 |
c |
704 |
Binary Search |
easy |
0.475 |
c |
777 |
Swap Adjacent in LR String |
medium |
0.333 |
c |
783 |
Minimum Distance Between BST Nodes |
easy |
0.504 |
c |
784 |
Letter Case Permutation |
easy |
0.566 |
c |
788 |
Rotated Digits |
easy |
0.541 |
c |
791 |
Custom Sort String |
medium |
0.617 |
c |
792 |
Number of Matching Subsequences |
medium |
0.428 |
c |
795 |
Number of Subarrays with Bounded Maximum |
medium |
0.431 |
c |
796 |
Rotate String |
easy |
0.489 |
c |
798 |
Smallest Rotation with Highest Score |
hard |
0.401 |
c |
804 |
Unique Morse Code Words |
easy |
0.746 |
c |
806 |
Number of Lines To Write String |
easy |
0.629 |
c |
807 |
Max Increase to Keep City Skyline |
medium |
0.813 |
c |
811 |
Subdomain Visit Count |
easy |
0.652 |
c |
812 |
Largest Triangle Area |
easy |
0.558 |
c |
821 |
Shortest Distance to a Character |
easy |
0.633 |
c |
824 |
Goat Latin |
easy |
0.576 |
c |
825 |
Friends Of Appropriate Ages |
medium |
0.361 |
c |
830 |
Positions of Large Groups |
easy |
0.477 |
c |
832 |
Flipping an Image |
easy |
0.725 |
c |
836 |
Rectangle Overlap |
easy |
0.464 |
c |
840 |
Magic Squares In Grid |
easy |
0.354 |
c |
844 |
Backspace String Compare |
easy |
0.459 |
c |
852 |
Peak Index in a Mountain Array |
easy |
0.695 |
c |
859 |
Buddy Strings |
easy |
0.276 |
c |
860 |
Lemonade Change |
easy |
0.503 |
c |
867 |
Transpose Matrix |
easy |
0.639 |
c |
876 |
Middle of the Linked List |
easy |
0.640 |
c |
880 |
Decoded String at Index |
medium |
0.229 |
c |
881 |
Boats to Save People |
medium |
0.437 |
c |
883 |
Projection Area of 3D Shapes |
easy |
0.657 |
c |
884 |
Uncommon Words from Two Sentences |
easy |
0.607 |
c |
888 |
Fair Candy Swap |
easy |
0.566 |
c |
892 |
Surface Area of 3D Shapes |
easy |
0.558 |
c |
896 |
Monotonic Array |
easy |
0.551 |
c |
899 |
Orderly Queue |
hard |
0.471 |
c |
905 |
Sort Array By Parity |
easy |
0.725 |
c |
908 |
Smallest Range I |
easy |
0.644 |
c |
917 |
Reverse Only Letters |
easy |
0.560 |
c |
922 |
Sort Array By Parity II |
easy |
0.669 |
c |
925 |
Long Pressed Name |
easy |
0.443 |
c |
929 |
Unique Email Addresses |
easy |
0.714 |
c |
934 |
Shortest Bridge |
medium |
0.438 |
c |
938 |
Range Sum of BST |
easy |
0.795 |
c |
941 |
Valid Mountain Array |
easy |
0.353 |
c |
942 |
DI String Match |
easy |
0.700 |
c |
944 |
Delete Columns to Make Sorted |
easy |
0.693 |
c |
949 |
Largest Time for Given Digits |
easy |
0.339 |
c |
953 |
Verifying an Alien Dictionary |
easy |
0.556 |
c |
957 |
Prison Cells After N Days |
medium |
0.379 |
c |
961 |
N-Repeated Element in Size 2N Array |
easy |
0.725 |
c |
962 |
Maximum Width Ramp |
medium |
0.413 |
c |
965 |
Univalued Binary Tree |
easy |
0.669 |
c |
969 |
Pancake Sorting |
medium |
0.622 |
c |
970 |
Powerful Integers |
easy |
0.395 |
c |
509 |
Fibonacci Number |
easy |
0.668 |
c |
973 |
K Closest Points to Origin |
medium |
0.624 |
c |
976 |
Largest Perimeter Triangle |
easy |
0.571 |
c |
977 |
Squares of a Sorted Array |
easy |
0.721 |
c |
978 |
Longest Turbulent Subarray |
medium |
0.453 |
c |
983 |
Minimum Cost For Tickets |
medium |
0.572 |
c |
984 |
String Without AAA or BBB |
medium |
0.334 |
c |
985 |
Sum of Even Numbers After Queries |
easy |
0.639 |
c |
986 |
Interval List Intersections |
medium |
0.625 |
c |
989 |
Add to Array-Form of Integer |
easy |
0.445 |
c |
991 |
Broken Calculator |
medium |
0.399 |
c |
994 |
Rotting Oranges |
easy |
0.463 |
c |
997 |
Find the Town Judge |
easy |
0.489 |
c |
999 |
Available Captures for Rook |
easy |
0.663 |
c |
1001 |
Grid Illumination |
hard |
0.340 |
c |
1002 |
Find Common Characters |
easy |
0.659 |
c |
1003 |
Check If Word Is Valid After Substitutions |
medium |
0.518 |
c |
1005 |
Maximize Sum Of Array After K Negations |
easy |
0.494 |
c |
1006 |
Clumsy Factorial |
medium |
0.541 |
c |
1007 |
Minimum Domino Rotations For Equal Row |
medium |
0.475 |
c |
1009 |
Complement of Base 10 Integer |
easy |
0.588 |
c |
1010 |
Pairs of Songs With Total Durations Divisible by 60 |
easy |
0.454 |
c |
1011 |
Capacity To Ship Packages Within D Days |
medium |
0.527 |
c |
1013 |
Partition Array Into Three Parts With Equal Sum |
easy |
0.551 |
c |
1014 |
Best Sightseeing Pair |
medium |
0.482 |
c |
1015 |
Smallest Integer Divisible by K |
medium |
0.278 |
c |
1016 |
Binary String With Substrings Representing 1 To N |
medium |
0.621 |
c |
1017 |
Convert to Base -2 |
medium |
0.558 |
c |
1018 |
Binary Prefix Divisible By 5 |
easy |
0.464 |
c |
1020 |
Number of Enclaves |
medium |
0.549 |
c |
1021 |
Remove Outermost Parentheses |
easy |
0.767 |
c |
1022 |
Sum of Root To Leaf Binary Numbers |
easy |
0.530 |
c |
1023 |
Camelcase Matching |
medium |
0.568 |
c |
1025 |
Divisor Game |
easy |
0.626 |
c |
1026 |
Maximum Difference Between Node and Ancestor |
medium |
0.590 |
c |
1030 |
Matrix Cells in Distance Order |
easy |
0.663 |
c |
1029 |
Two City Scheduling |
easy |
0.537 |
c |
1033 |
Moving Stones Until Consecutive |
easy |
0.343 |
c |
1034 |
Coloring A Border |
medium |
0.423 |
c |
1035 |
Uncrossed Lines |
medium |
0.510 |
c |
1038 |
Binary Search Tree to Greater Sum Tree |
medium |
0.803 |
c |
1037 |
Valid Boomerang |
easy |
0.372 |
c |
1041 |
Robot Bounded In Circle |
easy |
0.419 |
c |
1042 |
Flower Planting With No Adjacent |
easy |
0.471 |
c |
1046 |
Last Stone Weight |
easy |
0.636 |
c |
1047 |
Remove All Adjacent Duplicates In String |
easy |
0.624 |
c |
1048 |
Longest String Chain |
medium |
0.461 |
c |
1051 |
Height Checker |
easy |
0.710 |
c |
1052 |
Grumpy Bookstore Owner |
medium |
0.506 |
c |
1053 |
Previous Permutation With One Swap |
medium |
0.430 |
c |
1054 |
Distant Barcodes |
medium |
0.365 |
c |