LeetCode Solutions

Explanations, code and complexity notes.

Easy (3) Medium (4) Hard (0) All

#1 Two Sum

Array Hash Table

#2 Add Two Numbers

Linked List Math Recursion

#3 Longest Substring Without Repeating Characters

Hash Table String Sliding Window

#53 Maximum Subarray

Array Divide and Conquer Dynamic Programming

#189 Rotate Array

Array Math Two Pointers

#217 Contains Duplicate

Array Hash Table Sorting

#283 Move Zeroes

Array Two Pointers