Problems

Substring with Concatenation of All Words

Hash Table String Sliding Window

Solution

Hard

Jump Game

Array Dynamic Programming Greedy

Solution

Medium

Trapping Rain Water

Array Two Pointers Dynamic Programming Stack Monotonic Stack

Solution

Hard

Candy

Array Greedy

Solution

Hard

Merge Sorted Array

Array Two Pointers Sorting

Solution

Easy

Minimum Size Subarray Sum

Array Binary Search Sliding Window Prefix Sum

Solution

Medium

Remove Element

Array Two Pointers

Solution

Easy

Remove Duplicates from Sorted Array II

Array Two Pointers

Solution

Medium

Text Justification

Array String Simulation

Solution

Hard

Remove Duplicates from Sorted Array

Array Two Pointers

Solution

Easy

Product of Array Except Self

Array Prefix Sum

Solution

Medium

Two Sum II - Input Array Is Sorted

Array Two Pointers Binary Search

Solution

Medium

Is Subsequence

Two Pointers String Dynamic Programming

Solution

Easy

Integer to Roman

Hash Table Math String

Solution

Medium

Longest Common Prefix

Array String Trie

Solution

Easy

Insert Delete GetRandom O(1)

# 1 Array Hash Table Math Design Randomized

Solution

Medium

Length of Last Word

String

Solution

Easy

Best Time to Buy and Sell Stock

Array Dynamic Programming

Solution

Easy

Zigzag Conversion

String

Solution

Medium

Jump Game II

Array Dynamic Programming Greedy

Solution

Medium

Best Time to Buy and Sell Stock II

Array Dynamic Programming Greedy

Solution

Medium

Gas Station

Array Greedy

Solution

Medium

Majority Element

Array Hash Table Divide and Conquer Sorting Counting

Solution

Easy

Longest Substring Without Repeating Characters

Hash Table String Sliding Window

Solution

Medium

Container With Most Water

Array Two Pointers Greedy

Solution

Medium

Valid Palindrome

Two Pointers String

Solution

Easy

Minimum Window Substring

Hash Table String Sliding Window

Solution

Hard

Reverse Words in a String

Two Pointers String

Solution

Medium

H-Index

Array Sorting Counting Sort

Solution

Medium

3Sum

# 3 Array Two Pointers Sorting

Solution

Medium

Rotate Array

Array Math Two Pointers

Solution

Medium

Find the Index of the First Occurrence in a String

Two Pointers String String Matching

Solution

Easy

Roman to Integer

Hash Table Math String

Solution

Easy

Convert: Insert Delete GetRandom O(1)

Convert

LeetCode Problems

Substring with Concatenation of All Words

Jump Game

Trapping Rain Water

Candy

Merge Sorted Array

Minimum Size Subarray Sum

Remove Element

Remove Duplicates from Sorted Array II

Text Justification

Remove Duplicates from Sorted Array

Product of Array Except Self

Two Sum II - Input Array Is Sorted

Is Subsequence

Integer to Roman

Longest Common Prefix

Insert Delete GetRandom O(1)

Length of Last Word

Best Time to Buy and Sell Stock

Zigzag Conversion

Jump Game II

Best Time to Buy and Sell Stock II

Gas Station

Majority Element

Longest Substring Without Repeating Characters

Container With Most Water

Valid Palindrome

Minimum Window Substring

Reverse Words in a String

H-Index

3Sum

Rotate Array

Find the Index of the First Occurrence in a String

Roman to Integer

Convert: Insert Delete GetRandom O(1)