#include <stdio.h>

int main()
{
    unsigned long long int x, n;
    int i = 0;

    while (scanf("%llu", &x) && i < 10) {
        n = x / 2 + x / 3 + x / 4;

        if (n <= x) {
            printf("%llu\n", x);
        }
        else {
            printf("%llu\n", n);
        }
        i++;
    }

    return 0;
}