Matt Wang
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2025 / 05
LeetCode Study Note | Problem 42: Trapping Rain Water
2025-05-11
LeetCode
#Array
#Two Pointers
#Dynamic Programming
#Stack
🔍 Problem Description Given a non-negative integer array height[] representing the elevation map where the width of each bar is 1, compute how much w
LeetCode Study Note | Problem 53: Maximum Subarray
2025-05-10
LeetCode
#Array
#Divide and Conquer
#Dynamic Programming
Problem Overview Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its s
LeetCode Study Note | Problem 3: Longest Substring Without Repeating Characters
2025-05-07
LeetCode
#Hash Table
#String
#Sliding Window
Problem Overview Given a string s, find the length of the longest substring without repeating characters. Example: Input: "abcabcbb" Output: 3 Explana
2025 / 01
Welcome to My Digital Home
2025-01-28
Welcome to huachenwang.net — my personal technical workspace and knowledge archive. This site is where I document system design notes, DevOps practice
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