Persistent Systems — DSA Interview Questions

30 problems with animated explanations & C# solutions. (~42 common interview questions)

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

Medium Course Schedule II
Animate
Medium Network Delay Time
Animate
Medium House Robber II
Animate
Medium Longest Increasing Subsequence
Animate
Medium Interleaving String
Animate
Medium Jump Game
Animate
Medium Insert Interval
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Medium Spiral Matrix
Animate
Easy Single Number
Animate
Easy Contains Duplicate
Animate
Medium Encode and Decode Strings
Animate
Easy Best Time to Buy and Sell Stock
Animate
Medium Min Stack
Animate
Medium Search a 2D Matrix
Animate
Easy Merge Two Sorted Lists
Animate
Medium LRU Cache
Animate
Easy Same Tree
Animate
Medium Kth Smallest Element in a BST
Animate
Easy Kth Largest Element in a Stream
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Medium Subsets
Animate
Medium Letter Combinations of a Phone Number
Animate
Medium Rotting Oranges
Animate
Hard Word Ladder
Animate
Easy Climbing Stairs
Animate
Medium Coin Change
Animate
Medium Best Time to Buy and Sell Stock with Cooldown
Animate
Hard Burst Balloons
Animate
Medium Merge Triplets to Form Target Triplet
Animate
Medium Meeting Rooms II
Animate
Medium Pow(x, n)
Animate All companies
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