Range Queries & Prefix Sum

Basic Overview

Recursion & Backtracking Challenge

UNIQUE CODING CHALLENGE

#T20DSAChallenge is a ⚡ 7-day learning + coding sprint on a key DSA topic. Everyday we unlock a set of 🔒 concept video + coding problem – just watch the video to learn the concept, and then tackle the challenge!

Range Queries & Prefix Sum

Name

Difficulty

Submissions

Concept Video

Day 1: Minimum Operations to Reduce X to Zero

Easy

502

Day 2: Three Part Harmony

Medium

305

Day 3: Parallel Dilemma

Easy

Day 4: Sub Rectangle Sum 🍫

Hard

Day 5: Afraid of the Dark

Easy

Day 6: GCD Exclusion

Easy

Day 7: Maximum Diamond Sum 🍫

Medium

👑

Bonus: The Beauty and the Distance

Hard

Day 1: Minimum Operations to Reduce X to ZeroProblem

Difficulty: EasySubmissions: 502

Day 2: Three Part HarmonyProblem

Difficulty: MediumSubmissions: 305

Day 3: Parallel DilemmaProblem

Difficulty: EasySubmissions: 69

Day 4: Sub Rectangle Sum 🍫Problem

Difficulty: HardSubmissions: 1

Day 5: Afraid of the DarkProblem

Difficulty: EasySubmissions: 1

Day 6: GCD ExclusionProblem

Difficulty: EasySubmissions: 1

Day 7: Maximum Diamond Sum 🍫Problem

Difficulty: MediumSubmissions: 1

👑

Bonus: The Beauty and the DistanceCrown Problem

Difficulty: HardSubmissions: 1