LeetCode 134: Gas Station | Java Solution | Greedy Algorithm

🚗 Solving the classic Gas Station problem using a greedy approach. Learn how to determine if a circular route is possible with given gas and cost arrays. #leetcode #gasstation #greedyalgorithm #javaprogramming

⏱️ Time Complexity: O(n) - Single pass solution
💾 Space Complexity: O(1) - Constant extra space

## Timestamps
00:00 - Understanding problem statement
00:43 - Simulating the example
03:27 - Brute Force approach
03:52 - Brute Force - Big O Notation
04:17 - Greedy Algorithm explained
07:01 - Greedy Solution - Big O Notation
07:25 - Python code walk-through
08:23 - Solution analysis - runtime + memory

## Key Concepts
🔑 Greedy Algorithm
🔑 Circular Array Traversal
🔑 Net Gas Calculation
🔑 Single Pass Solution

## Learning Points
📝 Understanding why the greedy approach works for this problem
📝 How to identify the starting station efficiently
📝 Handling circular traversal problems
📝 Optimizing from brute force to linear time

## Related LeetCode Problems
• LeetCode 871: Minimum Number of Refueling Stops
• LeetCode 45: Jump Game II
• LeetCode 55: Jump Game
• LeetCode 1024: Video Stitching

## Target Audience
This video is ideal for software engineering candidates preparing for technical interviews at top tech companies, as well as computer science students learning about greedy algorithms.

## Prerequisites
• Basic understanding of Java programming
• Familiarity with array manipulation
• Understanding of greedy algorithm concepts

## Useful Links

## Additional Tips
• Pay close attention to the total gas vs. total cost comparison
• Remember that there's at most one valid starting point
• Focus on the proof of why checking just one starting point is sufficient

## Call to Action
If you found this solution helpful, please hit the like button and subscribe for more LeetCode problem solutions! Share your questions, alternative approaches, or optimization ideas in the comments below. #codinginterviewprep #javadeveloper