[백준] 3578 Holes - Greedy / Java

• 문제 링크

3578번: Holes

 

• 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 h = read();

        if (h == 0) sb.append("1");
        else if (h == 1) sb.append("0");
        else {
            if ((h & 1) == 1) sb.append("4");
            int i = h / 2;
            while (i-- > 0) sb.append("8");
        }

        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;
    }

}