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

int main(int argc, char const* argv[]) {
    int n;
    if (argc < 2 || (n = strtol(argv[1], NULL, 10)) == 0) {
        perror("Usage: flags n");
    }
    for (n; n > 0; n--) {

    }
    
    return 0;
}