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 #Array#Hash Table#String#Sorting

LeetCode Study Note | Problem 49: Group Anagrams

🧩 Problem Summary Given an array of strings, group the anagrams together. Anagram: A word formed by rearranging the letters of another word (e.g., "e

Administrator Administrator Published on 2025-05-12