Lesson 2 homework exercise 1-3

import java.util.Scanner;
public class lesson_2_homework {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        // Targil 1
        int rooms, duplex;
        String result ="Wrong amout of rooms!";
        System.out.println("Please enter amount of rooms(3,4 or 5)");
        rooms = sc.nextInt();
        if (rooms==3){result="LeTashlum: 120 nis";}
        else if(rooms==4){result="LeTashlum: 150 nis";}
        else if(rooms==5){
            System.out.println("Is it duplex?(Yes-1, No-0)");
            duplex = sc.nextInt();
            if(duplex==1){result="LeTashlum: 200 nis";}
            else if(duplex==0){result="LeTashlum: 180 nis";}
        }
        System.out.println(result);

        //Targil 2
        int price, items, discount_1;
        double discount_2;
        System.out.println("Enter price of items and amount of them separeted by space");
        price = sc.nextInt();
        items = sc.nextInt();
        discount_1 = price - (price / 300) * 50;
        if (items >= 3) {
            discount_2 = price * 0.8;
        } else {
            discount_2 = price;
        }
        if (discount_1 < discount_2) {
            System.out.printf("Price after first discount %d\n", discount_1);
        } else {
            System.out.printf("Price after second discount %f\n", discount_2);
        }

        //Targil 3
        int procent_attendance, test_grade, pre_test_grade, homework_grade, result_grade=0;
        System.out.println("Enter procent of student's attendance");
        procent_attendance=sc.nextInt();
        if (procent_attendance<80){ System.out.printf("Final grade: %d\n",result_grade);}
        else {
            System.out.println("Enter a test grade");
            test_grade=sc.nextInt();
            if(test_grade<60){System.out.printf("Final grade: %d\n",result_grade);}
            else {
                System.out.println("Enter a pre-test grade");
                pre_test_grade = sc.nextInt();
                result_grade = test_grade;
                if (test_grade < pre_test_grade) {
                    result_grade = (int) (test_grade * 0.8 + pre_test_grade * 0.2);
                }
                System.out.println("Enter homeworks grade");
                homework_grade = sc.nextInt();
                result_grade = (int) (result_grade * 0.9 + homework_grade * 0.1);
                System.out.printf("Final grade: %d\n",result_grade);
            }
        }

    }
}