Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 766 | Last Day Where You Can Still Cross | Hard | ArrayBinary SearchDepth-First Search |
| 767 | Last Moment Before All Ants Fall Out of a Plank | Medium | ArrayBrainteaserSimulation |
| 768 | Last Stone Weight | Easy | ArrayHeap (Priority Queue) |
| 769 | Last Stone Weight II | Medium | ArrayDynamic Programming |
| 770 | Last Visited Integers | Easy | ArraySimulation |
| 771 | Least Number of Unique Integers after K Removals | Medium | ArrayHash TableGreedy |
| 772 | Left and Right Sum Differences | Easy | ArrayPrefix Sum |
| 773 | Leftmost Column with at Least a One | Medium | ArrayBinary SearchMatrix |
| 774 | Lemonade Change | Easy | ArrayGreedy |
| 775 | Length of Longest Fibonacci Subsequence | Medium | ArrayHash TableDynamic Programming |
| 776 | Length of Longest Subarray With at Most K Frequency | Medium | ArrayHash TableSliding Window |
| 777 | Length of Longest V-Shaped Diagonal Segment | Hard | ArrayDynamic ProgrammingMemoization |
| 778 | Length of the Longest Increasing Path | Hard | ArrayBinary SearchSorting |
| 779 | Length of the Longest Subsequence That Sums to Target | Medium | ArrayDynamic Programming |
| 780 | Length of the Longest Valid Substring | Hard | ArrayHash TableString |
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