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Coding Problems

Practice coding problems and improve your algorithm skills

Showing 10 of 27 problems
Hard

Generate Large Binary Tree

TreeRandomPRNG
Medium

Merge Two Binary Trees

TreeRecursionBinary Tree
Medium

Depth of Binary Tree

TreeStringDepth-First Search
Medium

Count Friend Groups

GraphDFSConnected Components
Medium

Maximum Coins in Grid

MatrixDynamic ProgrammingAlgorithm
Easy

Find the Missing Number

ArrayMathAlgorithm
hard

Longest Increasing Subsequence

dynamic programmingarraybinary search
easy

Find the Intersection of Two Arrays

arrayhash tabletwo pointers
medium

Alternating Singleton Pattern

design patternssingleton patternobject-oriented design
easy

Longest Distinct Subarray

arrayssliding windowhash table