🧠 Leetcode 250 - Mastering Top Coding Interview Problems

Welcome to the Leetcode 250 repository – a curated collection of the 250 most frequently asked Leetcode questions with clean Python solutions, detailed explanations, and optimized code — ideal for preparing for FAANG, Big Tech, and startup coding interviews.

✅ If you’re searching for:
Leetcode 250 · Top 250 Leetcode Problems · FAANG Coding Prep · Python Interview Questions
Most Asked Leetcode Questions · Leetcode DSA Sheet · Leetcode for Big Tech Interviews
Data Structures and Algorithms in Python · Top Leetcode List 2024 · Best Leetcode Questions to Practice
Leetcode Pattern-Based Practice · Python Coding Interview Guide · Google Amazon Meta Interview Leetcode
Top DSA Problems for Product Based Companies · Coding Round Preparation in Python
Neetcode 150 vs Leetcode 250 · Leetcode Python Tracker · Crack the Coding Interview with Leetcode

You’ve landed in the right place.

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🚀 Why This Repository Stands Out

✔️ 250 curated questions to maximize your DSA preparation
✔️ Clean and readable Python solutions
✔️ Includes intuition, approach, time/space complexity
✔️ Structured by topic for ease of learning
✔️ Suitable for Google, Amazon, Meta, Microsoft, Netflix
✔️ Regular updates and daily commit logs
✔️ Easy folder navigation and problem search

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📚 Structured Problem Categories

💡 Topic	📌 Folder Name	📊 Problem Count
Arrays & Strings	arrays_strings/	~40 problems
Linked Lists	linked_lists/	~20 problems
Trees & Binary Trees	trees/	~35 problems
Graphs & Traversals	graphs/	~25 problems
Dynamic Programming	dp/	~40 problems
Sliding Window	sliding_window/	~20 problems
Binary Search	binary_search/	~15 problems
Backtracking	backtracking/	~20 problems
Stack & Queues	stack_queue/	~15 problems
Heap & Greedy	heap_greedy/	~15 problems
Bit Manipulation	bit_manipulation/	~10 problems
Math & Logic	math_logic/	~10 problems
Others & Miscellaneous	others/	~5 problems

📖 Detailed topic guide: See TOPICS.md for comprehensive explanations of each category.

📊 Progress Tracker

✅ Total Questions: 250

🔄 Solved: XX

📅 Updates: Daily commits

🎯 Track your progress: Run python progress_tracker.py to monitor your completion status across all categories.

⭐ Stars, forks, and contributions are welcome!

⭐ Support & Share

If this project helps you:

🌟 Give it a star

🍴 Fork it to your profile

🗣️ Share with friends and aspiring interview candidates

🧠 Example Format for Each Solution

"""
Problem: 121. Best Time to Buy and Sell Stock
Link: https://leetcode.com/problems/best-time-to-buy-and-sell-stock/
Level: Easy

Approach:
- Track the minimum price seen so far
- Track the maximum profit if sold today

Time Complexity: O(n)
Space Complexity: O(1)
"""

def maxProfit(prices):
    min_price = float('inf')
    max_profit = 0
    for p in prices:
        min_price = min(min_price, p)
        max_profit = max(max_profit, p - min_price)
    return max_profit