[Baekjoon]백준 NO.4344 평균은 넘겠지(브론즈1) / Java(자바)

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        int line = sc.nextInt();

        for (int i = 0; i < line; i++) {

            int student = sc.nextInt();
            int[] arr = new int[student]; // 학생 수 만큼 배열
            for (int j = 0; j < arr.length; j++) {

                arr[j] = sc.nextInt(); // 0번지부터 길이만큼 점수 넣어줘
            }

            double total = 0;
            double avg = 0;
            double count = 0;
            for (int k = 0; k < arr.length; k++) {
                total += arr[k];
            }
            avg = total / student;

            for (int h = 0; h < arr.length; h++) {
                if (arr[h] > avg) {
                    count++;
                }
            }
            double res = (count/student)*100;
            System.out.printf("%.3f%%\n",res);
        }
    }
}