import os
while 1:
    a = os.popen("./a.out")
        if a.readlines()[0].strip(): break

#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>

int mykbhit(void)
 {
 int fd;
 char c;
 fd = fileno(stdin);
 fcntl(fd, F_SETFL, O_NONBLOCK);
 if (read(fd, &c, sizeof(char)) < 0)
     return 0;
 return 1;
 }

int main()
    {
    int res;
    res = mykbhit();
    if(res)
        printf("1\n");
    else 
        printf("\n");
    return res;
    }