25 Top LeetCode Interview Problems
High-frequency questions across patterns — hash map, two pointers, sliding window, stack, intervals, linked list, trees, graphs, DP, LRU, and binary search. Each problem has interview thinking, a diagram, and Java / Python in tabs.
How to use this page Pick a problem. First read “Interview thinking” — that is what you should say in the first 60 seconds. Then study the diagram, the important constraints, the snippet, and the full solution. Switch Java / Python tabs; copy from the text area.