#include <stdio.h>
#include <unistd.h>
int main()
{
if (fork() || fork() && fork())
{
fork();
}
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CiNpbmNsdWRlIDx1bmlzdGQuaD4KCmludCBtYWluKCkKewogICAgaWYgKGZvcmsoKSB8fCBmb3JrKCkgJiYgZm9yaygpKQogICAgewogICAgICAgIHByaW50ZigiVklULUFQIFxuIik7CiAgICAgICAgZm9yaygpOwogICAgfQogICAgcHJpbnRmKCJIZWxsbyBcbiIpOwogICAgcmV0dXJuIDA7Cn0K