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.gitattributes
.gitattributes
 
 
108. Convert Sorted Array to Binary Search Tree.py
108. Convert Sorted Array to Binary Search Tree.py
 
 
118. Pascal's Triangle.py
118. Pascal's Triangle.py
 
 
119. Pascal's Triangle II.py
119. Pascal's Triangle II.py
 
 
152. Maximum Product Subarray.py
152. Maximum Product Subarray.py
 
 
153. Find Minimum in Rotated Sorted Array.py
153. Find Minimum in Rotated Sorted Array.py
 
 
16. 3Sum Closest.py
16. 3Sum Closest.py
 
 
1752. Check if Array Is Sorted and Rotated.py
1752. Check if Array Is Sorted and Rotated.py
 
 
18. 4Sum.py
18. 4Sum.py
 
 
1886. Determine Whether Matrix Can Be Obtained By Rotation.py
1886. Determine Whether Matrix Can Be Obtained By Rotation.py
 
 
189. Rotate Array.py
189. Rotate Array.py
 
 
1995. Count Special Quadruplets.py
1995. Count Special Quadruplets.py
 
 
2089. Find Target Indices After Sorting Array.py
2089. Find Target Indices After Sorting Array.py
 
 
2149. Rearrange Array Elements by Sign.py
2149. Rearrange Array Elements by Sign.py
 
 
219. Contains Duplicate II.py
219. Contains Duplicate II.py
 
 
2210. Count Hills and Valleys in an Array.py
2210. Count Hills and Valleys in an Array.py
 
 
229. Majority Element II.py
229. Majority Element II.py
 
 
2367. Number of Arithmetic Triplets.py
2367. Number of Arithmetic Triplets.py
 
 
2404. Most Frequent Even Element.py
2404. Most Frequent Even Element.py
 
 
2529. Maximum Count of Positive Integer and Negative Integer.py
2529. Maximum Count of Positive Integer and Negative Integer.py
 
 
278. First Bad Version.py
278. First Bad Version.py
 
 
2908. Minimum Sum of Mountain Triplets I.py
2908. Minimum Sum of Mountain Triplets I.py
 
 
2951. Find the Peaks.py
2951. Find the Peaks.py
 
 
3065. Minimum Operations to Exceed Threshold Value I.py
3065. Minimum Operations to Exceed Threshold Value I.py
 
 
31. Next Permutation.py
31. Next Permutation.py
 
 
33. Search in Rotated Sorted Array.py
33. Search in Rotated Sorted Array.py
 
 
34. Find First and Last Position of Element in Sorted Array.py
34. Find First and Last Position of Element in Sorted Array.py
 
 
35. Search Insert Position.py
35. Search Insert Position.py
 
 
448. Find All Numbers Disappeared in an Array.py
448. Find All Numbers Disappeared in an Array.py
 
 
454. 4Sum II.py
454. 4Sum II.py
 
 
48. Rotate Image.py
48. Rotate Image.py
 
 
485. Max Consecutive Ones.py
485. Max Consecutive Ones.py
 
 
493. Reverse Pairs.py
493. Reverse Pairs.py
 
 
54. Spiral Matrix.py
54. Spiral Matrix.py
 
 
540. Single Element in a Sorted Array.py
540. Single Element in a Sorted Array.py
 
 
56. Merge Intervals.py
56. Merge Intervals.py
 
 
560. Subarray Sum Equals K.py
560. Subarray Sum Equals K.py
 
 
59. Spiral Matrix II.py
59. Spiral Matrix II.py
 
 
704. Binary Search.py
704. Binary Search.py
 
 
73. Set Matrix Zeroes.py
73. Set Matrix Zeroes.py
 
 
75. Sort Colors.py
75. Sort Colors.py
 
 
81. Search in Rotated Sorted Array II.py
81. Search in Rotated Sorted Array II.py
 
 
852. Peak Index in a Mountain Array.py
852. Peak Index in a Mountain Array.py
 
 
88. Merge Sorted Array.py
88. Merge Sorted Array.py
 
 
Find the Index of the First Occurrence in a String.py
Find the Index of the First Occurrence in a String.py
 
 
Kth Largest Element in an Array.py
Kth Largest Element in an Array.py
 
 
Majority Element.py
Majority Element.py
 
 
Maximum Subarray.py
Maximum Subarray.py
 
 
Missing Number.py
Missing Number.py
 
 
Palindrome Number.py
Palindrome Number.py
 
 
RemoveDuplicatesfromSortedArray.py
RemoveDuplicatesfromSortedArray.py
 
 
Reverse Integer.py
Reverse Integer.py
 
 
ReverseString.py
ReverseString.py
 
 
ReverseStringII.py
ReverseStringII.py
 
 
Third Maximum Number.py
Third Maximum Number.py
 
 
besttimetobuystock.py
besttimetobuystock.py
 
 
readme.md
readme.md
 
 
scoreofstring.py
scoreofstring.py
 
 

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LeetCode DSA Solutions 🚀

Welcome to my repository where I'm consistently solving and uploading LeetCode problems to strengthen my Data Structures and Algorithms (DSA) skills.

This folder is a part of my daily learning journey as a Master's student in Computer Science, and my goal is to solve problems in different categories and programming languages.

📁 Folder Structure

All problems are organized inside the leetcode/ folder. Each problem typically includes:

  • Problem name (same as LeetCode title)
  • Solution code
  • Language used (mostly Python, Java, C++, etc.)

🧠 Topics Covered

  • Arrays
  • Strings
  • Hash Maps & Sets
  • Sliding Window
  • Two Pointers
  • Stack & Queue
  • Binary Search
  • Recursion & Backtracking
  • Trees & Graphs
  • Dynamic Programming (DP)

🛠 Languages Used

  • Python 🐍
  • Java ☕
  • C++ 💻

📅 Progress

I try to commit at least 1 problem daily or a few per week as part of my continuous learning.

🌐 LeetCode Profile

Check out my LeetCode progress: Harshil

📌 Note

These solutions are written for learning purposes and might include different approaches to the same problem (brute-force and optimized).

Happy Coding! 💻✨

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