| 25 |
Reverse Nodes In K Group |
Hard |
Linked List |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 24 |
Swap Nodes In Pairs |
Medium |
Linked List |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 23 |
Merge K Sorted Lists |
Hard |
Merge Sort, Divide and Conquer |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 22 |
Generate Parentheses |
Medium |
Recursion, Backtracking |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 21 |
Merge Two Sorted Lists |
Easy |
Linked List |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 20 |
Valid Parentheses |
Easy |
String, Stack |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 19 |
Remove Nth Node From End Of List |
Medium |
Linked List, Two Pointer Technique |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 18 |
3 Sum |
Medium |
Arrays |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 17 |
Letter Combinations Of A Phone Number |
Medium |
String, Recursion, BFS, DFS |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 16 |
3 Sum Closest |
Medium |
Arrays |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 15 |
3 Sum |
Medium |
Arrays |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 14 |
Longest Common Prefix |
Easy |
String, LCP |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 13 |
Roman To Integer |
Easy |
String |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 12 |
Integer To Roman |
Medium |
Array |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 11 |
Regular Expression Matching |
Medium |
Array |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 10 |
Regular Expression Matching |
Hard |
String, Dynamic Programming |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 9 |
Palindrome Number |
Easy |
Palindrome, Number |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 8 |
String To Integer (atoi) |
Medium |
String |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 7 |
Reverse Integer |
Easy |
Number |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 6 |
ZigZag Conversion |
Medium |
String |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 5 |
Longest Palindromic Substring |
Medium |
String, Manacher's Algorithm |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 4 |
Median Of Two Sorted Arrays |
Hard |
Arrays, Binary Search |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 3 |
Longest Substring Without Repeating Characters |
Medium |
String, Sliding Window |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 2 |
Add Two Numbers |
Medium |
Linked List |
Blog |
|
Java, Python, JavaScript, Kotlin |
| 1 |
Two Sum |
Easy |
HashMap |
Blog |
|
Java, Python, JavaScript, Kotlin |
