import java.util.Random;
import java.util.Scanner;

public class Generador {

    public static void main(String[] args) {
        char[] op = new char[]{'+', '-'};
        Random rand = new Random();
        Scanner in = new Scanner(System.in);
        int n1, n2, res, input;
        int ac = 0, ne = 0;
        long time = System.currentTimeMillis();
        for(int a = 0; a < 10; a++) {
            n1 = rand.nextInt(30) + 5;
            n2 = rand.nextInt(30) + 5;
            char x = op[rand.nextInt(2)];
            if(x == '+') {
                // add
                res = n1 + n2;
                System.out.print(n1 + " + " + n2 + " = ");
            } else {
                if(n1 < n2) {
                    int tmp = n1;
                    n1 = n2;
                    n2 = tmp;
                }
                // subtract
                res = n1 - n2;
                System.out.print(n1 + " - " + n2 + " = ");
            }
            input = in.nextInt();
            if(input == res) {
                ac++;
                System.out.println("Correcto");
            } else {
                ne++;
                System.out.println("Incorrecto");
            }
        }
        long end = (System.currentTimeMillis() - time) / 1000L;
        System.out.println();
        System.out.println("Has acertado " + ac);
        System.out.println("Has fallado " + ne);
        System.out.println("Tiempo tomado: " + end + "s");
    }

}