Coding Problems — Practice DSA, Arrays, Trees, Graphs | WoHoTech

of 347 solved

0% complete

Difficulty Breakdown

Easy

0/92

Medium

0/198

Hard

0/57

Day streak 🔥

Beginner

Daily Challenge

Resets in

Easy

Two Sum

ArrayHash Table

Solve Now

Learn

JavaScript

Functions, arrays, async logic, DOM, and interview basics.

Learn

Python

Beginner syntax, loops, functions, projects, and practice flow.

C++

Learn

C++

DSA patterns, arrays, strings, pointers, and interview practice.

Learn

Java

Core Java, OOP, collections, and DSA preparation.

Showing 347 of 347 problems

0 solved

✓TitleAcceptanceDifficulty

57.4%Easy

48.4%Medium

Longest Substring Without Repeating Characters

StringHash Table

36.9%Medium

Median of Two Sorted Arrays

42.8%Hard

0.0%Easy

0.0%Easy

Count Strictly Greater

0.0%Easy

0.0%Easy

0.0%Easy

0.0%Easy

0.0%Easy

Count Balanced Prefixes

0.0%Medium

0.0%Easy

0.0%Easy

0.0%Easy

0.0%Easy

0.0%Easy

First Repeated Character

StringHash Table

0.0%Easy

Compress Runs

StringCounting

0.0%Medium

Longest Same Letter Run

StringCounting

0.0%Easy

Count Words Simple

StringParsing

0.0%Easy

Remove Adjacent Duplicates Once

StringStack

0.0%Medium

Digital Sum

MathSimulation

0.0%Easy

Is Power Of Two Simple

0.0%Easy

0.0%Easy

0.0%Easy

0.0%Easy

0.0%Easy

0.0%Easy

0.0%Easy

Practice Calendar

September 2026

SMTWTFS

Week 2 • 1 days left

Daily Queue

Starter plan

Two SumEasy

Array · Hash Table

Add Two NumbersMedium

Linked List · Math · Recursion

Longest Substring Without Repeating CharactersMedium

String · Hash Table · Sliding Window

Open Study Plan

Focus Areas

Needs Practice

Topic Progress

Array0/129

String0/64

DFS0/39

Hash Table0/39

Tree0/38

Recent Activity

📝

Submit a solution to build history

📁 Local fallback catalog