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Problems Lists New Problem Interviews Ranking

Problems | Code Master

Problems Lists New Problem Interviews Ranking

Community challenges

The problem library

Pick a challenge, write your solution and let the AI judge it in real time.

57 problems

EasyQuest

Python Data Structure Mutability and Iteration Idioms

Hash TableArray

Code MasterSolve

Easy

Total Count of Maximum Frequency Elements

ArrayHash Table+1

Code MasterSolve

Medium

Word Frequency Sorter

Hash TableSorting+2

rubenchirino100.0% acceptedSolve

Easy

Count Unique Numbers

Hash TableArray+1

Code Master75.0% acceptedSolve

HardQuest

Java Object Mechanics: Dynamic Dispatch, Reachability, and Monitor Semantics

Hash TableData Structure Design

Code MasterSolve

Easy

Find the Majority Element

ArrayHash Table+1

Code Master50.0% acceptedSolve

Easy

Unique Email Addresses

Hash TableString+1

Code Master100.0% acceptedSolve

Easy

Integer Counter

Hash TableCounting+1

Code MasterSolve

Medium

Find All Anagrams in a String

Sliding WindowHash Table+1

Code Master50.0% acceptedSolve

Easy

Palindrome Permutation

Hash TableString+1

Code Master50.0% acceptedSolve

Easy

Sum of Unique Elements

Hash TableArray+1

Code MasterSolve

Easy

Array Element Parity

Hash TableArray

Code MasterSolve

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