Easy |
1232. Check If It Is a Straight Line |
1232. Check If It Is a Straight Line - [Python] O(1) space O(n) Runtime - using slope formula |
Medium |
525. Contiguous Array |
525. Contiguous Array - [Python] HashMap solution + Thinking Process Diagram |
Medium |
1143. Longest Common Subsequence |
1143. Longest Common Subsequence - [Python] DP solution with Explanation + Thinking process + Diagram |
Medium |
91. Decode Ways |
91. Decode Ways - [Python] Thinking process diagram (DP + DFS) |
Medium |
1277. Count Square Submatrices with All Ones |
1277. Count Square Submatrices with All Ones - [Python] DP Solution + Thinking Process Diagrams (O(mn) runtime; O(1) space) |
Medium |
221. Maximal Square |
221. Maximal Square - [Python] Thinking Process Diagrams - DP Approach |
Medium |
986. Interval List Intersections |
986. Interval List Intersections - [Python] Two Pointer Approach + Thinking Process Diagrams |
Hard |
124. Binary Tree Maximum Path Sum |
124. Binary Tree Maximum Path Sum - [Python] Recursion stack thinking process diagram |