🧠 LeetCode Solutions

Solving LeetCode problems consistently to crack campus placements.

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📊 Progress Tracker

Difficulty	Solved
🟢 Easy	0
🟡 Medium	0
🔴 Hard	0
Total	0

Update this table as you solve more problems!

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📁 Repository Structure

leetcode-solutions/
│
├── solutions/
│   ├── 0001_two_sum.py
│   ├── 0003_longest_substring_without_repeating.py
│   ├── 0076_minimum_window_substring.py
│   └── ...
│
├── notes/
│   ├── sliding_window.md
│   ├── two_pointers.md
│   └── ...
│
└── README.md

Each solution file is named: {4-digit-number}_{problem_slug}.py

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🗂️ Solutions by Topic

🪟 Sliding Window

#	Problem	Difficulty	Solution
3	Longest Substring Without Repeating Characters	🟡 Medium	solution
76	Minimum Window Substring	🔴 Hard	solution
209	Minimum Size Subarray Sum	🟡 Medium	solution
239	Sliding Window Maximum	🔴 Hard	solution
424	Longest Repeating Character Replacement	🟡 Medium	solution
438	Find All Anagrams in a String	🟡 Medium	solution
567	Permutation in String	🟡 Medium	solution
643	Maximum Average Subarray I	🟢 Easy	solution
904	Fruit Into Baskets	🟡 Medium	solution
1004	Max Consecutive Ones III	🟡 Medium	solution

🔢 Arrays & Hashing

#	Problem	Difficulty	Solution
1	Two Sum	🟢 Easy	solution

↔️ Two Pointers

#	Problem	Difficulty	Solution

🔍 Binary Search

#	Problem	Difficulty	Solution

🌲 Trees

#	Problem	Difficulty	Solution

🔗 Linked List

#	Problem	Difficulty	Solution

📈 Dynamic Programming

#	Problem	Difficulty	Solution

📚 Stack / Queue

#	Problem	Difficulty	Solution

🌐 Graphs

#	Problem	Difficulty	Solution

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📝 Notes & Patterns

Topic-wise concept notes are in the notes/ folder:

Topic	Notes
Sliding Window	notes/sliding_window.md

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🏷️ Solution File Template

Every solution file follows this format:

"""
Problem: <Name>
LeetCode #: <Number>
Difficulty: Easy / Medium / Hard
Link: https://leetcode.com/problems/<slug>/
Topic: <Topic>

Approach:
    <Brief description of the approach>

Time Complexity:  O(?)
Space Complexity: O(?)
"""

class Solution:
    def methodName(self, ...):
        pass

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🎯 Goal

Solve 200+ problems before campus placements covering all core DSA topics.

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⭐ Star this repo if you find it helpful!