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Grokking the Coding Interview Patterns

Solution: Diet Plan Performance

Explore how to apply the sliding window technique to solve the Diet Plan Performance problem. Understand how to maintain a running sum of calories over a window of k days, adjust points based on thresholds, and optimize solution efficiency. This lesson helps you implement a linear time, constant space approach for subarray sum evaluation.

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Statement

A dieter consumes calories[i] calories on the i-th day.

Given an integer k, the dieter reviews their calorie intake over every sequence of k consecutive days (from calories[i] to calories[i+k-1] for all 0 <= i <= n-k). For each sequence, they calculate T, the total calories consumed over those k days:

  • If T is less than lower, the dieter ...