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167 Commits
1025. Divisor Game .java
1025. Divisor Game .java
 
 
104. Maximum Depth of Binary Tree .py
104. Maximum Depth of Binary Tree .py
 
 
1068. Product Sales Analysis I .sql
1068. Product Sales Analysis I .sql
 
 
1071. Greatest Common Divisor of Strings .java
1071. Greatest Common Divisor of Strings .java
 
 
1075. Project Employees I .sql
1075. Project Employees I .sql
 
 
1137. N-th Tribonacci Number .py
1137. N-th Tribonacci Number .py
 
 
1141. User Activity for the Past 30 Days I .sql
1141. User Activity for the Past 30 Days I .sql
 
 
1148. Article Views I .sql
1148. Article Views I .sql
 
 
118. Pascal's Triangle .java
118. Pascal's Triangle .java
 
 
119. Pascal's Triangle II .java
119. Pascal's Triangle II .java
 
 
1193. Monthly Transactions I .sql
1193. Monthly Transactions I .sql
 
 
120. Triangle .py
120. Triangle .py
 
 
121. Best Time to Buy and Sell Stock .java
121. Best Time to Buy and Sell Stock .java
 
 
1211. Queries Quality and Percentage .sql
1211. Queries Quality and Percentage .sql
 
 
122. Best Time to Buy and Sell Stock II .java
122. Best Time to Buy and Sell Stock II .java
 
 
125. Valid Palindrome .java
125. Valid Palindrome .java
 
 
1251. Average Selling Price .sql
1251. Average Selling Price .sql
 
 
128. Longest Consecutive Sequence .py
128. Longest Consecutive Sequence .py
 
 
1280. Students and Examinations .sql
1280. Students and Examinations .sql
 
 
13. Roman to Integer .java
13. Roman to Integer .java
 
 
134. Gas Station .py
134. Gas Station .py
 
 
135. Candy
135. Candy
 
 
136. Single Number .java
136. Single Number .java
 
 
14. Longest Common Prefix .py
14. Longest Common Prefix .py
 
 
14. Longest Common Prefix.java
14. Longest Common Prefix.java
 
 
1431. Kids With the Greatest Number of Candies .java
1431. Kids With the Greatest Number of Candies .java
 
 
1492. The kth Factor of n .java
1492. The kth Factor of n .java
 
 
151. Reverse Words in a String .java
151. Reverse Words in a String .java
 
 
1527. Patients With a Condition .py
1527. Patients With a Condition .py
 
 
1581. Customer Who Visited but Did Not Make Any Transactions .sql
1581. Customer Who Visited but Did Not Make Any Transactions .sql
 
 
1633. Percentage of Users Attended a Contest .sql
1633. Percentage of Users Attended a Contest .sql
 
 
1661. Average Time of Process per Machine .sql
1661. Average Time of Process per Machine .sql
 
 
1667. Fix Names in a Table .sql
1667. Fix Names in a Table .sql
 
 
168. Excel Sheet Column Title .java
168. Excel Sheet Column Title .java
 
 
1683. Invalid Tweets .sql
1683. Invalid Tweets .sql
 
 
17. Letter Combinations of a Phone Number .py
17. Letter Combinations of a Phone Number .py
 
 
171. Excel Sheet Column Number .java
171. Excel Sheet Column Number .java
 
 
1729. Find Followers Count .sql
1729. Find Followers Count .sql
 
 
1731. The Number of Employees Which Report to Each Employee .sql
1731. The Number of Employees Which Report to Each Employee .sql
 
 
175. Combine Two Tables .sql
175. Combine Two Tables .sql
 
 
1752. Check if Array Is Sorted and Rotated .py
1752. Check if Array Is Sorted and Rotated .py
 
 
1757. Recyclable and Low Fat Products .sql
1757. Recyclable and Low Fat Products .sql
 
 
1768. Merge Strings Alternately .java
1768. Merge Strings Alternately .java
 
 
1789. Primary Department for Each Employee .sql
1789. Primary Department for Each Employee .sql
 
 
182. Duplicate Emails .sql
182. Duplicate Emails .sql
 
 
189. Rotate Array .py
189. Rotate Array .py
 
 
1934. Confirmation Rate .sql
1934. Confirmation Rate .sql
 
 
196. Delete Duplicate Emails .sql
196. Delete Duplicate Emails .sql
 
 
197. Rising Temperature .sql
197. Rising Temperature .sql
 
 
1978. Employees Whose Manager Left the Company .sql
1978. Employees Whose Manager Left the Company .sql
 
 
198. House Robber .py
198. House Robber .py
 
 
2. Add Two Numbers .py
2. Add Two Numbers .py
 
 
20. Valid Parentheses .java
20. Valid Parentheses .java
 
 
200. Number of Islands .py
200. Number of Islands .py
 
 
202. Happy Number .java
202. Happy Number .java
 
 
205. Isomorphic Strings .java
205. Isomorphic Strings .java
 
 
206. Reverse Linked List .py
206. Reverse Linked List .py
 
 
207. Course Schedule .py
207. Course Schedule .py
 
 
209. Minimum Size Subarray Sum .py
209. Minimum Size Subarray Sum .py
 
 
21. Merge Two Sorted Lists .py
21. Merge Two Sorted Lists .py
 
 
217. Contains Duplicate .java
217. Contains Duplicate .java
 
 
221. Maximal Square
221. Maximal Square
 
 
228. Summary Ranges .java
228. Summary Ranges .java
 
 
231. Power of Two .java
231. Power of Two .java
 
 
2356. Number of Unique Subjects Taught by Each Teacher .sql
2356. Number of Unique Subjects Taught by Each Teacher .sql
 
 
238. Product of Array Except Self .py
238. Product of Array Except Self .py
 
 
239. Sliding Window Maximum .py
239. Sliding Window Maximum .py
 
 
2405. Optimal Partition of String .java
2405. Optimal Partition of String .java
 
 
242. Valid Anagram .java
242. Valid Anagram .java
 
 
258. Add Digits .java
258. Add Digits .java
 
 
26. Remove Duplicates from Sorted Array .py
26. Remove Duplicates from Sorted Array .py
 
 
2620. Counter .js
2620. Counter .js
 
 
263. Ugly Number .java
263. Ugly Number .java
 
 
2635. Apply Transform Over Each Element in Array .js
2635. Apply Transform Over Each Element in Array .js
 
 
2667. Create Hello World Function .js
2667. Create Hello World Function .js
 
 
268. Missing Number .java
268. Missing Number .java
 
 
274. H-Index .py
274. H-Index .py
 
 
28. Find the Index of the First Occurrence in a String .java
28. Find the Index of the First Occurrence in a String .java
 
 
28. Find the Index of the First Occurrence in a String .py
28. Find the Index of the First Occurrence in a String .py
 
 
283. Move Zeroes .java
283. Move Zeroes .java
 
 
289. Game of Life .py
289. Game of Life .py
 
 
290. Word Pattern .java
290. Word Pattern .java
 
 
292. Nim Game .java
292. Nim Game .java
 
 
300. Longest Increasing Subsequence .py
300. Longest Increasing Subsequence .py
 
 
326. Power of Three .java
326. Power of Three .java
 
 
33. Search in Rotated Sorted Array .py
33. Search in Rotated Sorted Array .py
 
 
338. Counting Bits .java
338. Counting Bits .java
 
 
34. Find First and Last Position of Element in Sorted Array .py
34. Find First and Last Position of Element in Sorted Array .py
 
 
342. Power of Four .java
342. Power of Four .java
 
 
345. Reverse Vowels of a String .java
345. Reverse Vowels of a String .java
 
 
349. Intersection of Two Arrays .java
349. Intersection of Two Arrays .java
 
 
35. Search Insert Position
35. Search Insert Position
 
 
350. Intersection of Two Arrays II .java
350. Intersection of Two Arrays II .java
 
 
367. Valid Perfect Square .java
367. Valid Perfect Square .java
 
 
383. Ransom Note .java
383. Ransom Note .java
 
 
389. Find the Difference .java
389. Find the Difference .java
 
 
392. Is Subsequence .java
392. Is Subsequence .java
 
 
392. Is Subsequence .py
392. Is Subsequence .py
 
 
41. First Missing Positive .py
41. First Missing Positive .py
 
 
412. Fizz Buzz .java
412. Fizz Buzz .java
 
 

Repository files navigation

LeetCode Solutions

A collection of my solutions to various LeetCode coding challenges.

Overview

This repository contains my solutions to over 100 LeetCode problems, solved in multiple programming languages. Each solution is named according to the problem number and title for easy reference.

Languages

Solutions are implemented in:

  • Java
  • Python
  • SQL
  • JavaScript

Problem Categories

Solutions span various problem categories:

  • Arrays and Strings
  • Linked Lists
  • Trees and Graphs
  • Dynamic Programming
  • Database Queries
  • Hash Tables
  • Two Pointers
  • Binary Search
  • Math

Repository Structure

Files are named with the problem number and title:

[Problem Number]. [Problem Title].[language extension]

Example: 1. Two Sum.java

Recent Additions

  • 767 . Reorganize String
  • 239 . Sliding Window Maximum
  • 77 . Combinations
  • 619 . Biggest Single Number
  • 1137 . N-th Tribonacci Number

Stats

  • Total problems solved: 100+
  • Java solutions: 60+
  • Python solutions: 30+
  • SQL solutions: 15+
  • JavaScript solutions: 3+

How to Use

Each file contains a complete solution to the corresponding LeetCode problem. You can view the code directly in GitHub or clone the repository to explore the solutions locally.

git clone https://github.com/SanthoshD123/LeetCode-solutions.git

Contributing

Feel free to suggest improvements or alternative solutions through issues or pull requests.

License

This repository is for educational purposes only. Solutions are my personal implementations of the LeetCode problems.

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