#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <wait.h>
#include <signal.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <limits.h>

int
run(char *cmd)
{
    pid_t pid = fork();
    if (pid < 0) {
        return 0;
    } else if (!pid) {
        execlp(cmd, cmd, NULL);
        _exit(1);
    } else {
        int status;
        wait(&status);
        return (WIFEXITED(status) && !WEXITSTATUS(status));
    }
}

int
main(int argc, char **argv)
{
    int ok1 = 0, ok2 = 0;
    unsigned long long ok_sum = 0;

    while ((ok1 = run(argv[1])) || (ok2 = run(argv[2]))) {
        ok_sum += ok1 + ok2;
        for (int i = 3; i < argc; ++i) {
                if (!fork()) {
                execlp(argv[i], argv[i], NULL);
                _exit(1);
            }
        }
        int status;
        while (wait(&status) != -1) {
            ok_sum += (WIFEXITED(status) && !WEXITSTATUS(status));
        }
        ok1 = ok2 = 0;
    }

    printf("%llu\n", ok_sum);
}