import java.util.Random;
public class Main {
    public static void main(String[] args) {
            Random rand = new Random();

int myNumber = rand.nextInt(1000)-1;
// original num
            int stepOne;
            stepOne = myNumber * myNumber;
            int stepTwo = myNumber + stepOne;
            int stepThree = stepTwo/myNumber;
            int stepFour = stepThree + 17;
            int stepFive = stepFour - myNumber;
            int stepSix = stepFive/6;
            System.out.println(stepSix);



    }
}