LeetCode 904: Fruit Into Baskets | Python Solution | Sliding Window

In this problem, we need to pick maximum fruits from trees with a constraint of only having two baskets (each basket can only hold one type of fruit). #slidingwindow #array #twopointers **Time Complexity:** O(n) where n is the number of trees **Space Complexity:** O(1) as we only store at most 3 fruit types ### ⏱️ Timestamps 00:00 - Understanding problem statement 01:30 - Discuss more examples 02:17 - Sliding window approach 03:10 - Dry run 05:17 - Big O Notation calculated 05:49 - Python code walk-through 07:12 - Solution analysis - runtime + memory 07:21 - Conclusion ### 🔑 Key Concepts - Sliding Window Technique - Hash Map / Dictionary for frequency counting - Two Pointer approach - Efficient substring problems solving ### 📚 Learning Points - How to efficiently use sliding windows for substring problems - Optimizing space usage by tracking only necessary information - Converting complex constraints into maintainable conditions - Handling edge cases in array traversal problems ### 🔗 Related Problems 1. LeetCode 3: Longest Substring Without Repeating Characters 2. LeetCode 159: Longest Substring with At Most Two Distinct Characters 3. LeetCode 340: Longest Substring with At Most K Distinct Characters 4. LeetCode 424: Longest Repeating Character Replacement ### 👥 Target Audience This video is for coding interview candidates preparing for technical interviews at tech companies, as well as intermediate Python programmers looking to improve their problem-solving skills. ### 📋 Prerequisites - Basic understanding of Python - Knowledge of dictionaries/hash maps - Familiarity with array manipulation - Understanding of loop constructs ### 🔗 Links - LeetCode problem: https://leetcode.com/problems/fruit-into-baskets/ - Solution code: https://leetcode.com/problems/fruit-into-baskets/solutions/7050297/sliding-window-solution-in-python-with-v-iavb ### 💡 Additional Tips - Pay careful attention to the sliding window implementation - it's easy to make off-by-one errors - Focus on minimizing the number of passes through the array - Understanding when to shrink the window is crucial for optimality ### 🚀 Call to Action If you found this solution helpful, please hit that subscribe button and turn on notifications to never miss an upload! Drop your questions or alternative approaches in the comments below - I respond to every comment!