Commissions

# include <iostream>
using namespace std;
#include <iomanip>
#include <math.h>
#include <cmath>

int main()
{
    string city;
    double value;
    cin >> city;
    cin >> value;
    if (value >= 0 && value <= 500)
    {
        if (city == "Sofia")
        {
            cout << fixed << setprecision(2) << (value * 0.05) << endl;
        }
        else if (city == "Varna")
        {
            cout << fixed << setprecision(2) << (value * 0.045) << endl;
        }
        else if (city == "Plovdiv")
        {
            cout << fixed << setprecision(2) << (value * 0.055) << endl;
        }
        else
        {
            cout << "error" << endl;
        }
    }
    if (value > 500 && value <= 1000)
    {
        if (city == "Sofia")
        {
            cout << fixed << setprecision(2) << (value * 0.07) << endl;
        }
        else if (city == "Varna")
        {
            cout << fixed << setprecision(2) << (value * 0.075) << endl;
        }
        else if (city == "Plovdiv")
        {
            cout << fixed << setprecision(2) << (value * 0.08) << endl;
        }
        else
        {
            cout << "error" << endl;
        }
    }

    if (value > 1000 && value <= 10000)
    {
        if (city == "Sofia")
        {
            cout << fixed << setprecision(2) << (value * 0.08) << endl;
        }
        else if (city == "Varna")
        {
            cout << fixed << setprecision(2) << (value * 0.1) << endl;
        }
        else if (city == "Plovdiv")
        {
            cout << fixed << setprecision(2) << (value * 0.12) << endl;
        }
        else
        {
            cout << "error" << endl;
        }

    }
    if (value > 10000)
    {

        if (city == "Sofia")
        {
            cout << fixed << setprecision(2) << (value * 0.12) << endl;
        }
        else if (city == "Varna")
        {
        cout << fixed << setprecision(2) << (value * 0.13) << endl;
        }
        else if (city == "Plovdiv")
        {
        cout << fixed << setprecision(2) << (value * 0.145) << endl;
        }
        else
        {
            cout << "error" << endl;
        }

    }
    if     (value<0)
    {
        cout << "error" << endl;
    }



    return 0;
}