ZZULIOJ 1044: 不及格率，Java

1044: 不及格率

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
    Scanner cin = new Scanner(System.in);int n,ans,x;ans=0;n=cin.nextInt();for(int i=1;i<=n;i++){
    x=cin.nextInt();if(x<60) ans++;}System.out.printf("%.2f",1.0*ans/n);}
}