[백준] 31617 差 (Difference) - Brute Force / Java

• 문제 링크

https://www.acmicpc.net/problem/31617

 

• 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));

        int k = read();
        int[] a = new int[read()];
        for (int i = 0; i < a.length; i++) a[i] = read();
        int[] b = new int[read()];
        for (int i = 0; i < b.length; i++) b[i] = read();

        int cnt = 0;
        for (int i : a) for (int j : b) if (i + k == j) cnt++;

        bw.write(String.valueOf(cnt));
        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;
    }

}