01. Back To The Past

#include <iostream>
#include <map>

using namespace std;

int main() {
    double money;
    cin >> money;

    int year;
    cin >> year;

    int ivanchoEge = 18;

    for (int i = 1800; i <= year; i++) {

        money -= 12000;

        if (i % 2 == 1) {
            money -= 50 * ivanchoEge;
        }
        ivanchoEge++;
    }

    cout.setf(ios::fixed);
    cout.precision(2);

    if (money < 0) {
        cout << "He will need " << abs(money) << " dollars to survive.\n";
    }
    else {
        cout << "Yes! He will live a carefree life and will have " << money << " dollars left.\n";
    }

    return 0;
}