8 atestat

#include <iostream>
#include <fstream>

using namespace std;

int cmmdc(short n1, short n2) {
    if (!n1 && !n2)
        return 0;
    else
        if (!n1 && n2)
            return n2;
        else
            if (n1 && !n2)
                return n1;
            else {
                while (n1 != n2)
                    if (n1 > n2)
                        n1 -= n2;
                    else
                        n2 -= n1;
                return n1;
            }
}

int main() {
    int n;
    short n1, n2, n3, x;
    ifstream f("cmmdc3.in");
    ofstream g("cmmdc3.out");
    f >> n;
    n1 = n % 1000; n /= 1000;
    n2 = n % 1000; n /= 1000;
    n3 = n % 1000; n /= 1000;
    g << cmmdc(n3, cmmdc(n1, n2));
}