[백준 Java] 문자열 - 2675번: 문자열 반복

 

 

import java.io.*;
import java.util.StringTokenizer;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        StringTokenizer st;
        StringBuilder sb;
        int R;
        String S;

        int T = Integer.parseInt(br.readLine());
        for (int i = 0; i < T; i++) {
            st = new StringTokenizer(br.readLine());
            sb = new StringBuilder();
            R = Integer.parseInt(st.nextToken());
            S = st.nextToken();

            for (int j = 0; j < S.length(); j++) {
                for (int k = 0; k < R; k++) {
                    sb.append(S.charAt(j));
                }
            }
            bw.write(String.valueOf(sb));
            bw.write("\n");
        }

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