Coding Problems

Practice coding problems and improve your algorithm skills

Generate Large Binary Tree

Hard
Tree Random PRNG
🏢Jane Street
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Merge Two Binary Trees

Medium
Tree Recursion Binary Tree
🏢Salesforce
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Depth of Binary Tree

Medium
Tree String Depth-First Search
🏢LinkedIn
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Count Friend Groups

Medium
Graph DFS Connected Components
🏢Twitter
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Maximum Coins in Grid

Medium
Matrix Dynamic Programming Algorithm
🏢Zillow
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Find the Missing Number

Easy
Array Math Algorithm
🏢Google, Facebook+1
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Longest Increasing Subsequence

hard
dynamic programming array binary search sequence
🏢microsoft
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Find the Intersection of Two Arrays

easy
array hash table two pointers
🏢google, facebook+1
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Alternating Singleton Pattern

medium
design patterns singleton pattern object-oriented design multithreading
🏢microsoft
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Longest Distinct Subarray

easy
arrays sliding window hash table two pointers
🏢google
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Sparse Array Implementation

easy
array dsa algorithm
🏢facebook
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Cheapest Flight Itinerary

medium
graph theory shortest path algorithms dynamic programming greedy algorithms
🏢airbnb
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