백준 2675 (c) - 문자열 반복

#include <stdio.h>
#include <string.h>

int main(void)
{
    int n = 0;
    int r = 0;
    char arr[20] = {0};

    scanf("%d", &n);

    for (int i = 0; i < n; i++)
    {
        scanf("%d %s", &r, arr);

        for (int j = 0; j < strlen(arr); j++)
        {
            for (int z = 0; z < r; z++)
                printf("%c", arr[j]);
        }
        printf("\n");
    }

    return 0;
}