#include<stdio.h>
{
    int n, m, num;
    scanf("%d", &n);
    scanf("%d", &m);
    scanf("%d", &num);
    if(num!= 0 && num != 1) {
        printf("Invalid input");
    } else {
        for (int j = 0; i < n ;i++)
        {
            for (int j = 0; j < m; j++)
            {
                printf("%d",num);
            }
        }
        return 0;
    }