g0601_0700.s0643_maximum_average_subarray_i.Solution Maven / Gradle / Ivy

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package g0601_0700.s0643_maximum_average_subarray_i;

// #Easy #Array #Sliding_Window #2022_03_21_Time_5_ms_(74.81%)_Space_58.3_MB_(84.86%)

public class Solution {
    public double findMaxAverage(int[] nums, int k) {
        double windowSum = 0;
        int windowStart = 0;
        double max = Integer.MIN_VALUE;
        for (int windowEnd = 0; windowEnd < nums.length; ++windowEnd) {
            windowSum += nums[windowEnd];
            if (windowEnd >= k - 1) {
                double candidate = windowSum / k;
                max = Math.max(candidate, max);
                windowSum -= nums[windowStart];
                windowStart++;
            }
        }
        return max;
    }
}