[CLASS 1: 구현] 백준 2675 문자열 반복

2675번: 문자열 반복

https://www.acmicpc.net/problem/2675

 

# 코드

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb = new StringBuilder();
        int t = Integer.parseInt(br.readLine());
        StringTokenizer st;
        for (int i = 0; i < t; i++) {
            st = new StringTokenizer(br.readLine(), " ");
            int r = Integer.parseInt(st.nextToken());
            String s = st.nextToken();

            for (int j = 0; j < s.length(); j++) {
                sb.append(s.substring(j, j+1).repeat(r));
            }
            sb.append("\n");
        }

        System.out.println(sb);
        br.close();
    }
}

• repeat() : 문자열 반복 메서드로, 문자열을 주어진 반복 횟수만큼 반복한다.