public class Main {
    public static void main(String[] args) {
        System.out.println(numMin4(3,4,6, 5));
    }

    public static int numMin4(int a, int b, int c, int d) {
        return (numMin2(a, b) < c) ? ((numMin2(a, b) < d) ? numMin2(a, b) : d) : ((c < d) ? c : d);
    }

    public static int numMin2(int x, int y) {
        return x<y ? x:y;
    }
}