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

int main() {
    char tmp[4096];
    uint32_t counter = 0;
    while(1) {
        pid_t p = fork();
        if (p == 0) exit((scanf("%s", tmp) != EOF));
        else {
            int status;
                        waitpid(p, &status, 0);
            if (status == 0) break;
            counter += WEXITSTATUS(status);
        }
    }
    printf("%d", counter);
    return 0;
}