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intermediate · order 73

Fixed window maximum sum

arr-window-01Related book chapters: 15 (optional — this page is complete on its own)sliding-window

Slug: arr-window-01 · Paired reading: Chapter 15

Prompt

fn max_window_sum(a: &[i64], k: usize) -> Option<i64> — maximum sum of any contiguous window of length k. None if k == 0 or k > a.len().