My profile: https://leetcode.com/sirion34/
| Task num | Task name | Leetcode link | Solution link | Explaination link | Topics | Difficulty |
|---|---|---|---|---|---|---|
| 15 | 3Sum | problem | solution | Two Pointers, Sorting, Array | Medium | |
| 59 | Spiral Matrix II | problem | solution | my explaination | Simulation, Matrix, Array | Medium |
| 1 | Two Sum | problem | solution | Hash Table, Array | Easy | |
| 1260 | Shift 2D Grid | problem | solution | Simulation, Matrix, Array | Easy | |
| 14 | Longest Common Prefix | problem | solution | String | Easy | |
| 9 | Palindrome Number | problem | solution | Math | Easy | |
| 13 | Roman to Integer | problem | solution | Math, Hash Table, Array | Easy | |
| 69 | Sqrtx | problem | solution | Easy | ||
| 4 | Median of Two Sorted Arrays | problem | solution | Array, Binary Search, Divide and Conquer | Hard | |
| 700 | Search in a Binary Search Tree | problem | solution | Tree, Binary Search, Binary Tree | Easy | |
| 20 | Valid Parentheses | problem | solution | String, Stack | Easy | |
| 669 | Trim a Binary Search Tree | problem | solution | Tree, Binary Search, Binary Tree, Depth-First Search | Medium | |
| 2 | Add Two Numbers | problem | solution | Linked List, Math, Recursion | Medium | |
| 538 | Convert BST to Greater Tree | problem | solution | Tree, Binary Search, Binary Tree, Depth-First Search | Medium | |
| 897 | Increasing Order Search Tree | problem | solution | Tree, Binary Search, Binary Tree, Depth-First Search, Stack | Easy | |
| 230 | Kth Smallest Element in a BST | problem | solution | Tree, Binary Search, Binary Tree, Depth-First Search | Medium | |
| 21 | Merge Two Sorted Lists | problem | solution | Linked List, Recursion | Easy | |
| 26 | Remove Duplicates from Sorted Array | problem | solution | Array, Two Pointers | Easy | |
| 35 | Search Insert Position | problem | solution | Array, Binary Search | Easy | |
| 7 | Reverse Integer | problem | solution | Math | Medium | |
| 99 | Recover Binary Search Tree | problem | solution | Tree, Binary Search, Binary Tree, Depth-First Search | Medium | |
| 173 | Binary Search Tree Iterator | problem | solution | my explaination | Tree, Binary Search, Binary Tree, Stack, Iterator, Design | Medium |
| 705 | Design HashSet | problem | solution | Array, Hash Table, Linked List, Hash Function, Design | Easy | |
| 706 | Design HashMap | problem | solution | Array, Hash Table, Linked List, Hash Function, Design | Easy | |
| 66 | Plus One | problem | solution | Array, Math | Easy | |
| 155 | Min Stack | problem | solution | Stack, Design | Easy | |
| 535 | Encode and Decode TinyURL | problem | solution | Hash Table, Design, Hash Function, String | Medium | |
| 118 | Pascal's Triangle | problem | solution | my explaination | Array, Dynamic Programming | Easy |
| 224 | Basic Calculator | problem | solution | Math, String, Stack, Recursion | Hard | |
| 1396 | Design Underground System | problem | solution | Hash Table, String, Design | Medium | |
| 141 | Linked List Cycle | problem | solution | Hash Table, Linked List, Two Pointers | Easy | |
| 284 | Peeking Iterator | problem | solution | my explaination | Array, Design, Iterator | Medium |
| 202 | Happy Number | problem | solution | Hash Table, Two Pointers, Math | Easy | |
| 1584 | Min Cost to Connect All Points | problem | solution | Minimum Spanning Tree, Union Find, Array | Medium | |
| 206 | Reverse Linked List | problem | solution | Linked List, Recursion | Easy | |
| 203 | Remove Linked List Elements | problem | solution | Linked List, Recursion | Easy | |
| 844 | Backspace String Compare | problem | solution | String, Stack, Simulation, Two Pointers | Easy | |
| 2215 | Find the Difference of Two Arrays | problem | solution | Array, Hash Table | Easy | |
| 905 | Sort Array By Parity | problem | solution | Array, Two Pointers, Sorting | Easy | |
| 217 | Contains Duplicate | problem | solution | Array, Hash Table, Sorting | Easy | |
| 1679 | Max Number of K-Sum Pairs | problem | solution | Array, Hash Table, Sorting, Two Pointers | Medium | |
| 1209 | Remove All Adjacent Duplicates in String II | problem | solution | String, Stack | Medium | |
| 341 | Flatten Nested List Iterator | problem | solution | Tree, Stack, Iterator, Design, Depth-First Search, Queue | Medium | |
| 1641 | Count Sorted Vowel Strings | problem | solution | Dynamic Programming | Medium | |
| 867 | Transpose Matrix | problem | solution | Array, Matrix, Simulation | Easy | |
| 215 | Kth Largest Element in an Array | problem | solution | Array, Divide and Conquer, Sorting, Quickselect | Medium | |
| 100 | Same Tree | problem | solution | Tree, Binary Search, Depth-First Search, Breadth-First Search | Easy | |
| 101 | Symmetric Tree | problem | solution | Tree, Binary Search, Depth-First Search, Breadth-First Search | Easy | |
| 1354 | Construct Target Array With Multiple Sums | problem | solution | Array, Heap (Priority Queue) | Hard | |
| 665 | Non-decreasing Array | problem | solution | Array | Medium |