Apple — DSA Interview Questions

30 problems with animated explanations & C# solutions. (~99 common interview questions)

Step through algorithms visually, then solve with stdin/stdout auto-judge.

Medium Unique Paths
Animate
Hard Distinct Subsequences
Animate
Medium Gas Station
Animate
Medium Non-overlapping Intervals
Animate
Easy Happy Number
Animate
Easy Counting Bits
Animate
Easy Two Sum
Animate
Easy Valid Palindrome
Animate
Medium Longest Repeating Character Replacement
Animate
Medium Generate Parentheses
Animate
Medium Find Minimum in Rotated Sorted Array
Animate
Medium Remove Nth Node From End of List
Animate
Hard Reverse Nodes in k-Group
Animate
Medium Lowest Common Ancestor of a Binary Search Tree
Animate
Hard Binary Tree Maximum Path Sum
Animate
Medium K Closest Points to Origin
Animate
Medium Permutations
Animate
Medium Number of Islands
Animate
Medium Course Schedule
Animate
Medium Min Cost to Connect All Points
Animate
Medium House Robber
Animate
Medium Word Break
Animate
Medium Target Sum
Animate
Medium Maximum Subarray
Animate
Medium Valid Parenthesis String
Animate
Medium Rotate Image
Animate
Medium Detect Squares
Animate
Medium Reverse Integer
Animate
Medium Valid Sudoku
Animate
Hard Trapping Rain Water
Animate All companies
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