[백준] 15121 Star Arrangements - Brute Force / Java

• 문제 링크

https://www.acmicpc.net/problem/15121

 

• 풀이 코드

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        StringBuilder sb = new StringBuilder();

        int n = read(), r;
        sb.append(n).append(':');
        for (int i = 2; i < n; i++)
            for (int j = i - 1; j <= i; j++)
                if ((r = n % (i + j)) == 0 || r == i) sb.append('\n').append(i).append(',').append(j);

        bw.write(sb.toString());
        bw.flush();
    }

    private static int read() throws IOException {
        int c, n = System.in.read() & 15;
        while ((c = System.in.read()) > 32) n = (n << 3) + (n << 1) + (c & 15);

        return n;
    }

}