import java.io.*;
import java.util.*;

class A3 {
    static {
        System.loadLibrary("A3");
    }

    private native int add(int a, int b);
    private native int sub(int a, int b);
    private native int mult(int a, int b);
    private native int div(int a, int b);

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a, b, ch;

        System.out.println("\nEnter value of a : ");
        a = sc.nextInt();
        System.out.println("\nEnter value of b : ");
        b = sc.nextInt();

        do {
            System.out.println("\nENTER YOUR CHOICE : ");
            ch = sc.nextInt();
            switch (ch) {
                case 1:
                    new A3().add(a, b);
                    break;
                case 2:
                    new A3().sub(a, b);
                    break;
                case 3:
                    new A3().mult(a, b);
                    break;
                case 4:
                    new A3().div(a, b);
                    break;
                default:
                    System.out.println("Your choice is wrong.");
            }
        } while (ch < 5);
    }
}