Huachen Wang

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Huachen Wang

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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 # Depth-First Search#Breadth-First Search#Graph#Shortest Path#Priority Queue

LeetCode Study Note | Problem 743: Network Delay Time

📘 Problem Overview You are given a directed, weighted graph with n nodes (1-indexed), and a list of travel times times, where each element is [u, v,

Administrator Administrator Published on 2025-05-19
LeetCode Study Note #Graph#Breadth-First Search# Depth-First Search# Topological Sort

LeetCode Study Note | Problem 207: Course Schedule

Problem Summary You are given numCourses courses labeled from 0 to numCourses - 1, and a list of prerequisites where each element is a pair [a, b] mea

Administrator Administrator Published on 2025-05-17
LeetCode Study Note #Array#Breadth-First Search#Matrix

LeetCode Study Note | Problem 994: Rotting Oranges

🔍 Problem Overview You’re given an m x n grid, where: 0 represents an empty cell 1 represents a fresh orange 2 represents a rotten orange Each minute

Administrator Administrator Published on 2025-05-17
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