🎮 Sliding Window (Practice)

Companion to the Sliding Window guide. Watch the window slide and reuse its sum in O(1), then implement it.

🎬 Watch it work

Max sum subarray of size kStep 1 / 5

2

1

5

1

3

2

First window (size 3) sum = 8

Speed1x

🐍 Your turn

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🧠 Challenge yourself

1. Return the starting index of the best window, not just the sum.
2. Switch to a variable-size window: smallest subarray with sum ≥ target.
3. Longest substring without repeating characters — why is a window ideal?

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Continue the path → Binary Search