Leetcode AC Solutions

Hi there 👋,

Welcome to my Leetcode solutions repository! Here, you'll find my solutions to various LeetCode problems in C++, Java, and Python, including problems from the weekly and monthly contests, as well as other challenges.

If you find these solutions helpful in any way, please give this repo a ⭐️. It means a lot and helps me keep motivated to continue sharing my work.

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Thank you for your support, and I hope these solutions help you on your journey to becoming a better problem solver. Happy coding! 😄

This repository contains a log of my LeetCode solutions, including problems from the weekly contests, monthly contests, and other challenges.

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You can access my solutions below 👇

• 0001 Two Sum

• 0003 Longest Substring Without Repeating Characters

• 0004 Median of Two Sorted Arrays

• 0007 Reverse Integer

• 0009 Palindrome Number

• 0010 Regular Expression Matching

• 0011 Container With Most Water

• 0012 Integer to Roman

• 0013 Roman to Integer

• 0014 Longest Common Prefix

• 0015 3Sum

• 0017 Letter Combinations of a Phone Number

• 0018 4Sum

• 0019 Remove Nth Node From End of List

• 0020 Valid Parentheses

• 0021 Merge Two Sorted Lists

• 0024 Swap Nodes in Pairs

• 0025 Reverse Nodes in k-Group

• 0026 Remove Duplicates from Sorted Array

• 0027 Remove Element

• 0028 Find the Index of the First Occurrence in a String

• 0029 Divide Two Integers

• 0030 Substring with Concatenation of All Words

• 0031 Next Permutation

• 0032 Longest Valid Parentheses

• 0033 Search in Rotated Sorted Array

• 0034 Find First and Last Position of Element in Sorted Array

• 0035 Search Insert Position

• 0037 Sudoku Solver

• 0039 Combination Sum

• 0040 Combination Sum II

• 0041 First Missing Positive

• 0042 Trapping Rain Water

• 0046 Permutations

• 0047 Permutations II

• 0048 Rotate Image

• 0050 Pow(x, n)

• 0051 N-Queens

• 0052 N-Queens II

• 0054 Spiral Matrix

• 0058 Length of Last Word

• 0061 Rotate List

• 0062 Unique Paths

• 0066 Plus One

• 0069 Sqrt(x)

• 0074 Search a 2D Matrix

• 0075 Sort Colors

• 0077 Combinations

• 0078 Subsets

• 0080 Remove Duplicates from Sorted Array II

• 0081 Search in Rotated Sorted Array II

• 0083 Remove Duplicates from Sorted List

• 0084 Largest Rectangle in Histogram

• 0090 Subsets II

• 0092 Reverse Linked List II

• 0098 Validate Binary Search Tree

• 0100 Same Tree

• 0103 Binary Tree Zigzag Level Order Traversal

• 0105 Construct Binary Tree from Preorder and Inorder Traversal

• 0106 Construct Binary Tree from Inorder and Postorder Traversal

• 0108 Convert Sorted Array to Binary Search Tree

• 0111 Minimum Depth of Binary Tree

• 0112 Path Sum

• 0118 Pascal's Triangle

• 0125 Valid Palindrome

• 0130 Surrounded Regions

• 0136 Single Number

• 0137 Single Number II

• 0141 Linked List Cycle

• 0142 Linked List Cycle II

• 0152 Maximum Product Subarray

• 0153 Find Minimum in Rotated Sorted Array

• 0154 Find Minimum in Rotated Sorted Array II

• 0162 Find Peak Element

• 0167 Two Sum II - Input Array Is Sorted

• 0169 Majority Element

• 0189 Rotate Array

• 0199 Binary Tree Right Side View

• 0200 Number of Islands

• 0204 Count Primes

• 0206 Reverse Linked List

• 0209 Minimum Size Subarray Sum

• 0216 Combination Sum III

• 0217 Contains Duplicate

• 0222 Count Complete Tree Nodes

• 0223 Rectangle Area

• 0231 Power of Two

• 0234 Palindrome Linked List

• 0235 Lowest Common Ancestor of a Binary Search Tree

• 0236 Lowest Common Ancestor of a Binary Tree

• 0237 Delete Node in a Linked List

• 0240 Search a 2D Matrix II

• 0242 Valid Anagram

• 0263 Ugly Number

• 0268 Missing Number

• 0274 H-Index

• 0275 H-Index II

• 0278 First Bad Version

• 0283 Move Zeroes

• 0287 Find the Duplicate Number

• 0290 Word Pattern

• 0300 Longest Increasing Subsequence

• 0316 Remove Duplicate Letters

• 0326 Power of Three

• 0342 Power of Four

• 0344 Reverse String

• 0349 Intersection of Two Arrays

• 0350 Intersection of Two Arrays II

• 0367 Valid Perfect Square

• 0371 Sum of Two Integers

• 0374 Guess Number Higher or Lower

• 0377 Combination Sum IV

• 0378 Kth Smallest Element in a Sorted Matrix

• 0383 Ransom Note

• 0387 First Unique Character in a String

• 0389 Find the Difference

• 0390 Elimination Game

• 0392 Is Subsequence

• 0400 Nth Digit

• 0417 Pacific Atlantic Water Flow

• 0441 Arranging Coins

• 0443 String Compression

• 0449 Serialize and Deserialize BST

• 0450 Delete Node in a BST

• 0458 Poor Pigs

• 0485 Max Consecutive Ones

• 0509 Fibonacci Number

• 0520 Detect Capital

• 0540 Single Element in a Sorted Array

• 0543 Diameter of Binary Tree

• 0547 Number of Provinces

• 0557 Reverse Words in a String III

• 0567 Permutation in String

• 0633 Sum of Square Numbers

• 0645 Set Mismatch

• 0658 Find K Closest Elements

• 0659 Split Array into Consecutive Subsequences

• 0668 Kth Smallest Number in Multiplication Table

• 0698 Partition to K Equal Sum Subsets

• 0700 Search in a Binary Search Tree

• 0704 Binary Search

• 0729 My Calendar I

• 0733 Flood Fill

• 0744 Find Smallest Letter Greater Than Target

• 787 Cheapest Flights Within K Stops

• 0792 Number of Matching Subsequences

• 0823 Binary Trees With Factors

• 0836 Rectangle Overlap

• 0844 Backspace String Compare

• 0852 Peak Index in Mountain Array

• 0858 Mirror Reflection

• 0869 Reordered Power of 2

• 0905 Sort Array By Parity

• 0909 Snakes and Ladders

• 0912 Sort An Array

• 0944 Delete Columns to Make Sorted

• 0948 Bag of Tokens

• 0976 Largest Perimeter Triangle

• 0987 Vertical Order Traversal of a Binary Tree

• 0994 Rotting Oranges

• 0997 Find the Town Judge

• 1009 Complement of Base 10 Integer

• 1020 Number of Enclaves

• 1037 Valid Boomerang

• 1047 Remove All Adjacent Duplicates In String

• 1071 Greatest Common Divisor of Strings

• 1220 Count Vowels Permutation

• 1281 Subtract the Product and Sum of Digits of an Integer

• 1283 Find the Smallest Divisor Given a Threshold

• 1295 Find Numbers with Even Number of Digits

• 1323 Maximum 69 Number

• 1328 Break a Palindrome

• 1329 Sort the Matrix Diagonally

• 1337 The K Weakest Rows in a Matrix

• 1346 Check If N and Its Double Exist

• 1351 Count Negative Numbers in a Sorted Matrix

• 1385 Find the Distance Value Between Two Arrays

• 1431 Kids With the Greatest Number of Candies

• 1539 Kth Missing Positive Number

• 1544 Make The String Great

• 1608 Special Array With X Elements Greater Than or Equal X

• 1832 Check if the Sentence Is Pangram

• 1855 Maximum Distance Between a Pair of Values

• 1910 Remove All Occurrences of a Substring

• 1929 Concatenation of Array

• 1991 Find the Middle Index in Array

• 2095 Delete the Middle Node of a Linked List

• 2169 Count Operations to Obtain Zero

• 2235 Add Two Integers

• 2244 Minimum Rounds to Complete All Tasks

• 2359 Find Closest Node to Given Two Nodes

• 2380 Time Needed to Rearrange a Binary String

• 2395 Find Subarrays With Equal Sum

• 2404 Most Frequent Even Element

• 2405 Optimal Partition of String

• 2413 Smallest Even Multiple

• 2439 Minimize Maximum of Array

• 2444 Count Subarrays With Fixed Bounds

• 2540 Minimum Common Value

• 2859 Sum of Values at Indices With K Set Bits

• 2869 Minimum Operations to Collect Elements

• 2870 Minimum Number of Operations to Make Array Empty

• 2908 Minimum Sum of Mountain Triplets I

• 2917 Find the K-or of an Array

• 2918 Minimum Equal Sum of Two Arrays After Replacing Zeros

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Contributors

Contributions are always welcome! If you'd like to add a solution to a new problem or improve an existing solution, feel free to open a pull request.

If you have any issues or suggestions for improving this repository, please open an issue.

Happy coding! 💻 ✨