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core12 min

Maximum Average Subarray (Fixed Window)

Maximum Average Subarray

Given an array nums and an integer k, find the contiguous subarray of length exactly k with the maximum average, and return that average.

The fixed-size sliding window: sum the first k, then slide — add the entering element, subtract the leaving one — so each step is O(1) instead of re-summing.

findMaxAverage([1, 12, -5, -6, 50, 3], 4); // 12.75  ((-5-6+50+3)/4)

Run your code to see results.

Stuck? This challenge exercises:

javascript.data-structures