백준 4344 평균은넘겠지(Java)

문제보기

4344번: 평균은 넘겠지

 

 

정답

package baekjoon.ex_array;

import java.util.Scanner;

public class Q_4344 {

    public static void main(String[] args) throws Exception {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        String str = br.readLine();
        int C = Integer.parseInt(str);
        List<String> arr = new ArrayList<String>(); // 모든 입력값
        for (int i = 0; i < C; i++) {
            // bw.append(i + "\n");
            arr.add(br.readLine());
        }

        List<Integer> avgChk = new ArrayList<Integer>();
        int sum;
        int overChk;
        double pers;

        for (int i = 0; i < C; i++) {
            int count = Integer.parseInt(arr.get(i).split(" ")[0]);
            sum = 0;
            overChk = 0;
            pers = 0;
            for (int j = 1; j < count + 1; j++) {
                sum += Integer.parseInt(arr.get(i).split(" ")[j]);
            }
            int tmp = sum / count;
            avgChk.add(tmp);
            for (int k = 1; k < count + 1; k++) {
                // 평균보다 높은 사람 찾기
                if (avgChk.get(i) < Integer.parseInt(arr.get(i).split(" ")[k])) {
                    overChk++;
                }
            }
            // pers = (overChk + 0.000) / count;
            // pers = pers * 100;
            // DecimalFormat df = new DecimalFormat("#.###");
            // String resPers = df.format(pers);
            // result.add(resPers);
            System.out.printf("%.3f", 100.0 * overChk / count);
            System.out.println("%");
        }

        br.close();
        bw.flush();
        bw.close();
    }
}