08. Pet Shop

#include <iostream>
using namespace std;

int main() {
    double dogFoodPrice = 2.50, catFoodPrice = 4.00;

    int dogFoodCount, catFoodCount;
    cin >> dogFoodCount >> catFoodCount;

    double totalPrice = dogFoodPrice * dogFoodCount + catFoodPrice * catFoodCount;

    cout << totalPrice << " lv." << endl;

    return 0;
}