백준 1546 평균 - java

import java.util.Scanner;

public class Test {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int N = sc.nextInt();
		double[] arr = new double[N];
		double max = -987654321, M = 0;

		for (int i = 0; i < N; i++) {
			arr[i] = sc.nextInt();
			if (max < arr[i]) {
				max = arr[i];
			}
		}

		for (int i = 0; i < N; i++) {
			M += arr[i] / max * 100.0;
		}
		System.out.println(M / N);
	}
}