[백준] 28446 볼링공 찾아주기 - Data Structure / Java

• 문제 링크

28446번: 볼링공 찾아주기

 

• 풀이 코드

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.HashMap;
import java.util.Map;

public class Main {

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

        Map<Integer, Integer> map = new HashMap<>();

        int m = read();
        while (m-- > 0) {
            if (read() == 1) {
                int i = read();
                map.put(read(), i);
            } else sb.append(map.get(read())).append("\n");
        }

        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;
    }

}