qwq

#include <bits/stdc++.h>
using namespace std;
int main(){
    int money = 0, hx[15];
    int cdq = 0;
    for(int i=1;i<=12;i++){
        cin >> hx[i];
        if(money + 300 < hx[i]){
            cout << '-' << i;
            return 0;
        }
        money = money + 300 - hx[i];
        if(money / 100 != 0){
            cdq = cdq + (money / 100 * 100);
            money = money / 100 + (money % 100);
        }
    }
    cout << money + (cdq / 5 * 6);
    return 0;
}