ac

#include <iostream>
using namespace std;

int main() {
int remain = 0;
int save_total = 0;
bool flag = true;

for (int month = 1; month <= 12; ++month) {
    int budget;
    cin >> budget;
    int current = remain + 300;
    if (current < budget) {
        cout << "-" << month << endl;
        flag = false;
        break;
    }
    int month_end = current - budget;
    if (month_end >= 100) {
        int save = (month_end / 100) * 100;
        save_total += save;
        remain = month_end - save; 
    } else {
        remain = month_end; 
    }
}
if (flag) {
    int final_money = remain + save_total * 1.2;
    cout << final_money << endl;
}

return 0;

}