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#System Design 1 #Priority Queue 1 #Shortest Path 1 #Greedy 2 # Topological Sort 1 #Graph 2 #Matrix 2 #Breadth-First Search 4 # Depth-First Search 3 #Union Find 2 #Sorting 2 #Recursion 1 #Math 1 #Linked List 1 #Stack 1 #Two Pointers 3 #Dynamic Programming 5 #Divide and Conquer 1 #Array 11 #Sliding Window 1 #String 2 #Hash Table 3
LeetCode Study Note #Array# Depth-First Search#Breadth-First Search#Matrix#Union Find

LeetCode Study Note | Problem 200: Number of Islands

🌊 Problem Summary You are given a 2D grid consisting of '1's (land) and '0's (water). An island is formed by connecting adjacent lands horizontally o

Administrator Administrator Published on 2025-05-17
LeetCode Study Note #Array#Hash Table#Union Find

LeetCode Study Note | Problem 128: Longest Consecutive Sequence

📌 Problem Summary Given an unsorted array of integers, find the length of the longest consecutive elements sequence. Time complexity must be O(n). Ex

Administrator Administrator Published on 2025-05-12