kingsubin

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {
    public static void main(String[] args) throws Exception{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

        int N = Integer.parseInt(br.readLine());
        int[] ans = new int[10001];

        for (int i = 0; i < N; i++) { // N
            ans[Integer.parseInt(br.readLine())]++;
        }

        for (int i = 0; i < ans.length; i++) {
            if (ans[i] != 0) {
                for (int j = 0; j < ans[i]; j++) {
                    bw.write(Integer.toString(i) + "\n");
                }
            }
        }

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

}

 

- 계층정렬해야 하는거 생각 했는데 계속 시간초과 걸려서 못품

- print 말고 BufferedWriter로 출력해야함 

 

 

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https://www.acmicpc.net/problem/10989