Wedding Party

#include <iostream>
#include <cmath>

using namespace std;

int main() {
    int guests, budget;
    cin >> guests >> budget;

    budget -= guests * 20;

    if (budget < 0) {
        cout << "They won't have enough money to pay the covert. They will need " << abs(budget) << " lv more.\n";
    }
    else {
        cout << "Yes! " << round(0.40 * budget) << " lv are for fireworks and " << round(0.60 * budget) << " lv are for donation.\n";
    }

    return 0;
}