package ConditionalStatements;

import java.util.Scanner;

public class sedma {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String grad = scanner.nextLine();
        double sales = Double.parseDouble(scanner.nextLine());

        if(sales<0.0){
            System.out.println("error");
        }else if(grad.equals("Sofia")){
            if(sales>=0 && sales<=500){
                System.out.printf("%.2f",sales*5/100);
            }if(sales>500 && sales<=1000){
                System.out.printf("%.2f",sales*7/100);
            }if(sales>1000 && sales <=10000){
                System.out.printf("%.2f",sales*8/100);
            }if(sales>10000){
                System.out.printf("%.2f",sales*12/100);
            }
        }else if(grad.equals("Varna")) {
            if (sales >= 0 && sales <= 500) {
                System.out.printf("%.2f",sales * 4.5 / 100);
            }
            if (sales > 500 && sales <= 1000) {
                System.out.printf("%.2f",sales * 7.5 / 100);
            }
            if (sales > 1000 && sales <= 10000) {
                System.out.printf("%.2f",sales * 10 / 100);
            }
            if (sales > 10000) {
                System.out.printf("%.2f",sales * 13 / 100);
            }
        }else if(grad.equals("Plovdiv")) {
            if (sales >= 0 && sales <= 500) {
                System.out.printf("%.2f",sales * 5.5 / 100);
            }
            if (sales > 500 && sales <= 1000) {
                System.out.printf("%.2f",sales * 8 / 100);
            }
            if (sales > 1000 && sales <= 10000) {
                System.out.printf("%.2f",sales * 12 / 100);
            }
            if (sales > 10000) {
                System.out.printf("%.2f", sales * 14.5 / 100);
            }
        }else if(!grad.equals("Plovdiv") ||!grad.equals("Sofia") ||!grad.equals("Varna")){
            System.out.println("error");
        }

    }
}