#include <bits/stdc++.h>
using namespace std;
int main()
{
    int money = 0;  //津津手里的钱数
    int mother = 0; //存在妈妈那的钱数
    for (int i = 1; i <= 12; i++)
    {
        money += 300; //发钱了
        int x;
        cin >> x;   //当前月的预算
        money -= x; //花钱
        if (money < 0)
        {
            //预算不够了
            cout << -i;
            break;
        }
        //存钱
        mother += money / 100 * 100;
        money = money % 100;
    }
    if (money >= 0)
        cout << mother * 120 / 100 + money;
    return 0;
}