How should I practice Find Max Heart Rate Difference?

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Find Max Heart Rate Difference

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Problem statement

A health monitoring device recorded N consecutive measurements. At the K-th measurement, the device recorded heart rate heartRate[K] and activity level activityLevel[K] (possible levels are "Low", "Normal", or "High").

Find the maximum difference between the highest and lowest heart rate values within the same activity level over a single period.

Function

findMaxHeartRateDifference(heartRate: int[], activityLevel: String[]) → int

Examples

Example 1

heartRate = [100, 87, 90, 90, 125]activityLevel = ["Normal", "Normal", "Normal", "High", "Low"]return = 13

Within the three periods of "Normal" activity level, the heart rate ranges from 87 to 100, with the maximum difference being 13.

Constraints

1 <= heartRate.length == activityLevel.length <= 10^5
1 <= heartRate[i] <= 300
activityLevel[i] is "Low", "Normal", or "High".