[백준] 1546번 : 평균 - C#

https://www.acmicpc.net/problem/1546

using System;

class Program
{
    static void Main() {
        string s1=Console.ReadLine();
        int n=int.Parse(s1);
        string[] s=Console.ReadLine().Split(' ');
        int sum=0;
        int max=0;
        for(int i=0;i<n;i++){
            int a=int.Parse(s[i]);
            if(a>=max) max=a;
            sum+=a;
        }
        Console.Write("{0:F6}",(double)sum*100/max/n);
    }
}