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Home » Subtopics

Hash-Table

Detect Squares

May 20, 2022 · 5 min · array · backtracking · counting · database · design · design/data-structure · dynamic-programming · enumeration · greedy · hash-table · heap-priority-queue · leetcode · math · matrix · memoization · ordered-set · prefix-sum · sorting · stack · string · Last updated: Jul 28, 2025

Minimize Malware Spread 2

May 18, 2022 · 8 min · array · breadth-first-search · depth-first-search · graph · hash-table · leetcode · union-find · Last updated: Aug 2, 2025

4Sum 2 - 4 Different Arrays

April 30, 2022 · 4 min · array · hash-table · leetcode · Last updated: Aug 2, 2025

Open the Lock

April 28, 2022 · 4 min · array · bfs · breadth-first-search · hash-table · leetcode · shortest-path · string · Last updated: Aug 10, 2025

Partition Labels

April 28, 2022 · 3 min · greedy · hash-table · leetcode · string · two-pointers · Last updated: Aug 2, 2025

Encode and Decode TinyURL

April 26, 2022 · 3 min · daily-coding-problem · design · hash-function · hash-table · leetcode · string · Last updated: Aug 2, 2025

Unique Length-3 Palindromic Subsequences

April 24, 2022 · 6 min · array · binary-search · binary-tree · bit-manipulation · database · depth-first-search · dynamic-programming · greedy · hash-table · leetcode · prefix-sum · string · tree · video · Last updated: Aug 2, 2025

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