Oct 20, 2025
77. Combinations
leetcodemediumbacktrackingrecursioncombinations
Oct 20, 2025
46. Permutations
leetcodealgorithmmediumbacktrackingrecursion
Oct 20, 2025
1650. Lowest Common Ancestor of a Binary Tree III
leetcodealgorithmmediumtreebinary-treelca
Oct 20, 2025
2043. Simple Bank System
leetcodealgorithmmediumdesigndata-structure
Oct 20, 2025
1443. Minimum Time to Collect All Apples in a Tree
leetcodealgorithmmediumtreedfsbfsgraph
Oct 20, 2025
84. Largest Rectangle in Histogram
leetcodealgorithmhardstackmonotonic-stack
Oct 20, 2025
695. Max Area of Island
leetcodealgorithmmediumdfsgraphmatrix
Oct 20, 2025
1868. Product of Two Run-Length Encoded Arrays
leetcodealgorithmmediumrun-length-encodingtwo-pointersarray-processing
Oct 20, 2025
[Medium] 1570. Dot Product of Two Sparse Vectors
leetcodealgorithmmediumcpphash-mapdata-structureoptimizationproblem-solving
Oct 20, 2025
[Medium] 1865. Finding Pairs With a Certain Sum
leetcodealgorithmmediumcpphash-mapdata-structureproblem-solving