[Java] 1546번 평균

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int A[] = new int[N];
        
        for(int i=0; i<N; i++) {
            A[i] = sc.nextInt();
        }
        
        long sum = 0;
        long max = 0;
        
        for(int i=0; i<N; i++) {
            if(A[i] > max ) max = A[i];
            sum = sum + A[i];
        }
        
        System.out.println(sum * 100.0 / max / N);
    }
}