[백준] 4344번 : 평균은 넘겠지 - C#

https://www.acmicpc.net/problem/4344

using System;

class Program
{
    static void Main() {
        string s=Console.ReadLine();
        int n=int.Parse(s);
        for(int i=0;i<n;i++){
            string[] s1=Console.ReadLine().Split(' ');
            int m=int.Parse(s1[0]);
            int sum=0;
            int count=0;
            int[] arr=new int[m];
            for(int j=0;j<m;j++){
                arr[j]=int.Parse(s1[j+1]);
                sum+=arr[j];
            }
            double ave=(double)sum/m;
            for(int j=0;j<m;j++){
                if(arr[j]>ave) count++;
            }
            Console.WriteLine("{0:F3}%",(double)count*100/m);
        }
    }
}