#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main(int argc, char **argv) {
    if (argc != 2) {
        printf("Usage: %s [n]\n", argv[0]);
        exit(1);
    }

    int n = atoi(argv[1]);
    for (int i = 0; i < n; ++i) {
        fork();
        sleep(5);
    }
}