Leet Code

32: Longest Valid Parentheses

2 minute read

Longest Valid Parentheses

34: Find First and Last Position of Element in Sorted Array

1 minute read

Find the first and last position.

37: Sudoku Solver

1 minute read

Sudoku Solver

41: First Missing Positive

2 minute read

First Missing Positive

136: Single Number

less than 1 minute read

Single Number

158: Read N Characters Given read4 II - Call Multiple Times

2 minute read

Read N Characters Given read4 II - Call Multiple Times

162: Find Peak Element

1 minute read

Find Peak Element

173: Binary Search Tree Iterator

1 minute read

Binary Search Tree Iterator

212: Word Search II

2 minute read

Word Search II

239: Sliding Window Maximum

2 minute read

Sliding Window Maximum

259: 3Sum Smaller

less than 1 minute read

3Sum Smaller

264: Ugly Number II

1 minute read

Ugly Number II

269: Alien Dictionary

2 minute read

Alien Dictionary

300: Longest Increasing Subsequence

1 minute read

Longest Increasing Subsequence

301: Remove Invalid Parentheses

2 minute read

Palindromic Substrings

309: Best Time to Buy and Sell Stock with Cooldown

2 minute read

Best Time to Buy and Sell Stock with Cooldown

338: Counting Bits

less than 1 minute read

Count the number of bits for 0 to n

348: Design Tic-Tac-Toe

1 minute read

Design Tic-Tac-Toe

347: Top K Frequent Elements

less than 1 minute read

Get the K most frequent element

371: Sum of Two Integers

less than 1 minute read

Add two integers without +/-

424: Longest Repeating Character Replacement

1 minute read

Longest Repeating Character Replacement

435: Non-overlapping Intervals

less than 1 minute read

Minimal intervals to remove to get non-overlapping intervals

448: Find All Numbers Disappeared in an Array

less than 1 minute read

Find All Numbers Disappeared in an Array

449: Serialize and Deserialize BST

2 minute read

Serialize and Deserialize BST

472: Concatenated Words

2 minute read

Concatenated Words

480: Sliding Window Median

3 minute read

Sliding Window Median

630: Course Schedule III

2 minute read

Course Schedule III

631: Design Excel Sum Formula

3 minute read

Design Excel Sum Formula

647: Palindromic Substrings

1 minute read

Palindromic Substrings

679: 24 Game

2 minute read

24 Game

759: Employee Free Time

1 minute read

Employee Free Time

828: Count Unique Characters of All Substrings of a Given String

1 minute read

Count Unique Characters of All Substrings of a Given String

871: Minimum Number of Refueling Stops

1 minute read

Minimum Number of Refueling Stops

1073: Adding Two Negabinary Numbers

1 minute read

Adding Two Negabinary Numbers

1143: Longest Common Subsequence

2 minute read

Finding longest common subsequence between two strings.

1775: Equal Sum Arrays With Minimum Number of Operations

1 minute read

Equal Sum Arrays With Minimum Number of Operations

1196: Filling Bookcase Shelves

2 minute read

Filling Bookcase Shelves

1326: Minimum Cost to Reach Destination in Time

1 minute read

Minimum Cost to Reach Destination in Time

1352: Maximum Profit in Job Scheduling

2 minute read

Maximum Profit in Job Scheduling

1398: Number of Ways to Stay in the Same Place After Some Steps

2 minute read

Number of Ways to Stay in the Same Place After Some Steps

1511: Count Number of Teams

3 minute read

Count Number of Teams

1573 Number of Ways to Split a String

1 minute read

Number of Ways to Split a String

1744: Number of Ways to Form a Target String Given a Dictionary

4 minute read

Number of Ways to Form a Target String Given a Dictionary

1851: Maximum Number of Events That Can Be Attended II

3 minute read

Maximum Number of Events That Can Be Attended II

1901: Find a Peak Element II

2 minute read

Find a Peak Element II

1912: Design Movie Rental System

2 minute read

Design Movie Rental System

1928: Minimum Cost to Reach Destination in Time

2 minute read

Minimum Cost to Reach Destination in Time