#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

void binnum ( int length )
{
    for (int i=0; i< (1<<length); i++)
    {
        int mask = (1<<(length-1));
        for (int j=0; j<length; j++)
        {
            if ((i&mask) == 0)
                putchar ('0');
            else 
                putchar ('1');
            mask >>= 1;
        }
        putchar('\n');
    }
}

int main (int argc, char* argv[])
{
    if (argc<=1)
        return 0;
        
    int length = atoi(argv[1]);
    
    if (length<=0)
        return 0;
    
    binnum ( length );
}