/* $begin forkprob2 */
#include "csapp.h"

void end(void) 
{
    printf("2"); 
}

int main() 
{
    if (Fork() == 0) 
	atexit(end);
    if (Fork() == 0)
	printf("0");
    else
	printf("1");
    exit(0);
}
/* $end forkprob2 */