Hi, I'm Yash Kumar Singh, a 2nd-year Chemical Engineering undergrad from NIT Durgapur (2024–2028).
This repository documents my summer vacation journey (May–July 2025) to solve 150+ DSA (Data Structures & Algorithms) questions using C++ on LeetCode.
It's a focused 10-week challenge to level up problem-solving and algorithmic thinking.
- Solve 150+ DSA problems by July end
- Master techniques like sliding window, prefix sum, recursion, trees, graphs, and more
- Build interview-level confidence in core data structures and algorithms
- ✅ Problems Solved: 126 (so far)
- 🧠 Current Focus: Backtracking + Recursion
- 🔄 Approach: 2–3 problems/day with increasing difficulty
| Week | Topics Covered | Status |
|---|---|---|
| Week 0 | C++ STL Basics | ✅ Done |
| Week 1 | Arrays + Sliding Window | ✅ Done |
| Week 2 | Strings + Sorting | ✅ Done |
| Week 3 | Linked List | ✅ Done |
| Week 4 | Trees + Stack & Queue | ✅ Done |
| Week 5 | Bit Manipulation + Maths | ✅ Done |
| Week 6 | Greedy + Hashing | ✅ Done |
| Week 7 | Binary Search, Heaps & Priority Queue | ✅ Done |
| Week 8 | Backtracking + Recursion | ✅ Done |
| Week 9 | Graphs (BFS / DFS / DSU) | ⏳ In Progress |
| Week 10 | Intro to Dynamic Programming | ⏳ Upcoming |
- Arrays & Prefix/Kadane's
- Sliding Window, Two Pointers
- Strings & Anagrams
- Linked List, Stack, Queue
- Trees & Tree Traversals
- Bit Manipulation & Maths
- Heaps & Priority Queues
- Recursion & Backtracking
- Binary Search Variants
- Greedy Algorithms & Hashing
- Graphs (BFS, DFS, DSU)
- Basic Dynamic Programming
📁 Repository Structure
📦DSA-Leetcode-Practice/
├── C++ STL BASICS/
│ ├── two-sum.cpp
│ ├── ...
│ └── README.md
├──ARRAYS + SLIDING WINDOW/
│ ├── maximum-subarray.cpp
│ ├── ...
│ └── README.md
├──STRINGS + SORTING/
│ ├── valid-anagram.cpp
│ ├── ...
│ └── README.md
├──LINKED LIST/
│ ├── linked-list-cycle.cpp
│ ├── ...
│ └── README.md
├──TREES + STACK & QUEUE/
│ ├── ...
│ └── README.md
├──BIT MANIPULATION + MATHS/
│ └── ...
├──GREEDY + HASHING/
├──BINARY SEACH + HEAPS + PQ/
├──BACKTRACKING & RECUSION/
├──GRAPHS/
├──DYNAMIC PROGRAMMING/
└── README.md ← Main repository overview
#📦Each topic folder includes:
-✅ C++ solution files named by problem (e.g., two-sum.cpp).
-🧠 Problem statement + my approach + time & space complexity in comments.
-📌 A README.md listing all problems with their LeetCode links.
⚙ Tools Used
Language: C++
Platform: LeetCode
Editor: VS Code / LeetCode IDE
Version Control: Git & GitHub
✅ Motivation
This repo is my summer effort to grow into a better problem solver — learning the patterns, thinking in edge cases, and preparing for technical interviews.
License
This project is licensed under the MIT License — see the LICENSE file for details.