Task24

class Task24 {
    public static int gcd(int a, int b) {
        while (b > 0) {
            a %= b;
            int tmp = a;
            a = b;
            b = tmp;
        }
        return a;
    }

    public static int gcd4(int a, int b, int c, int d) {
        return gcd(gcd(gcd(a, b), c), d);
    }
}