#include <sys/wait.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>


int main(int argc, char *argv[]) {
    char word[4097];
    int counter = 0;
    pid_t pid;
    pid_t root = -1;
    do {
        if (scanf("%s", word) != EOF) {
            counter++;
            pid = fork();
            if (counter == 1 && pid > 0) root = pid;
        } else {
            if (counter == 0) {
                printf("%d", counter);
                return 0;
            }
            return counter;
            break;
        }
    } while (counter <= 255 && pid == 0);

    if (pid > 0) {
        int status;
        waitpid(pid, &status, 0);
        int exit_status = WEXITSTATUS(status);
        if (pid == root) {
            printf("%d", exit_status);
            return 0;
        }
        return exit_status;
    }

}