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 #Array#Two Pointers#Sorting

LeetCode Study Note | Problem 15: 3Sum

✨ Problem Description Given an integer array nums, return all the unique triplets [nums[i], nums[j], nums[k]] such that i ≠ j ≠ k, and nums[i] + nums[

Administrator Administrator Published on 2025-05-15
LeetCode Study Note #Two Pointers#Array

LeetCode Study Note | Problem 283: Move Zeroes

🧩 Problem Description Given an integer array nums, move all 0’s to the end of it while maintaining the relative order of the non-zero elements. Examp

Administrator Administrator Published on 2025-05-15
LeetCode Study Note #Array#Two Pointers#Dynamic Programming#Stack

LeetCode Study Note | Problem 42: Trapping Rain Water

🔍 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

Administrator Administrator Published on 2025-05-11