| 217. Contains Duplicate | Easy | View Solutions |
| 53. Maximum Subarray | Easy | View Solutions |
| 1. Two Sum | Easy | View Solutions |
| 88. Merge Sorted Array | Easy | View Solutions |
| 350. Intersection of Two Arrays II | Easy | N/A |
| 121. Best Time to Buy and Sell Stock | Easy | View Solutions |
| 566. Reshape the Matrix | Easy | N/A |
| 118. Pascal's Triangle | Easy | View Solutions |
| 36. Valid Sudoku | Medium | View Solutions |
| 74. Search a 2D Matrix | Medium | View Solutions |
| 387. First Unique Character in a String | Easy | N/A |
| 383. Ransom Note | Easy | View Solutions |
| 242. Valid Anagram | Easy | View Solutions |
| 141. Linked List Cycle | Easy | View Solutions |
| 21. Merge Two Sorted Lists | Easy | N/A |
| 203. Remove Linked List Elements | Easy | N/A |
| 206. Reverse Linked List | Easy | View Solutions |
| 83. Remove Duplicates from Sorted List | Easy | N/A |
| 20. Valid Parentheses | Easy | View Solutions |
| 232. Implement Queue using Stacks | Easy | N/A |
| 144. Binary Tree Preorder Traversal | Easy | View Solutions |
| 94. Binary Tree Inorder Traversal | Easy | View Solutions |
| 145. Binary Tree Postorder Traversal | Easy | View Solutions |
| 102. Binary Tree Level Order Traversal | Easy | View Solutions |
| 104. Maximum Depth of Binary Tree | Easy | View Solutions |
| 101. Symmetric Tree | Easy | View Solutions |
| 226. Invert Binary Tree | Easy | View Solutions |
| 112. Path Sum | Easy | View Solutions |