Oct 22, 2025
Difficulty: Medium
Category: String, Stack
Companies: Amazon, Facebook, Microsoft, Google
leetcodemediumstringstack
Oct 22, 2025
Difficulty: Medium
Category: Array, Sorting, Simulation
Companies: Amazon, Google, Microsoft, Uber
leetcodemediumarraysorting
Oct 22, 2025
Difficulty: Medium
Category: Tree, Linked List, DFS
Companies: Amazon, Microsoft, Facebook
leetcodemediumtreelinked-list
Oct 22, 2025
Difficulty: Medium
Category: Design, Array, Matrix
Companies: Amazon, Google, Microsoft, Facebook
leetcodemediumdesignarray
Oct 22, 2025
Difficulty: Medium
Category: Array, Matrix, DFS
Companies: Amazon, Google, Microsoft
leetcodemediumarraymatrix
Oct 21, 2025
Difficulty: Medium
Category: Tree, DFS, Binary Tree
Companies: Amazon, Google, Facebook, Microsoft
leetcodemediumtreedfs
Oct 21, 2025
Difficulty: Medium
Category: Array, Hash Table, Heap, Bucket Sort, Quickselect
Companies: Amazon, Google, Facebook, Microsoft, Apple
leetcodemediumarrayhash-tableheap
Oct 21, 2025
Difficulty: Medium
Category: Array, Sorting, Heap, Quickselect
Companies: Amazon, Google, Facebook, Microsoft
leetcodemediumarraysorting
Oct 21, 2025
Difficulty: Easy
Category: Array, Hash Table
Companies: Amazon, Google, Microsoft
leetcodeeasyarrayhash-table
Oct 20, 2025
There are a total of numCourses courses you have to take, labeled from 0 to numCourses - 1. You are given an array prerequisites where prerequisites[i] = [ai, bi] indicates...
leetcodemediumgraphtopological-sortcycle-detection