// 24.04.2021
import java.util.Scanner;

public class Ex03 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        Scanner in = new Scanner(System.in);

        // double sa3at ;
        // double ajrSa3a;
        // double ajrShahri;

        double sa3at, ajrSa3a, ajrShahri;
        double mefra3a;
        System.out.print("number of hours: ");
        sa3at = in.nextDouble();

        System.out.print("price for hour: ");
        ajrSa3a = in.nextDouble();

        System.out.print("mefra3a: ");
        mefra3a = in.nextDouble();

        ajrShahri = sa3at * ajrSa3a - mefra3a;

        // שעות נוספות
        if (sa3at > 160) {
            double overTime = sa3at - 160;
            double overPrice = 0.25 * ajrSa3a;
            double overSalary = overTime * overPrice;

            ajrShahri = ajrShahri + overSalary;
        }

        System.out.println("Toatal salary = " + ajrShahri);

        in.close();
    }
}