#include <bits/stdc++.h>
using namespace std;
int y = 0,n = 0,s = 0;
int main()
{
    for(int i=1;i<=12;i++)
    {
        cin>>y;
        n = n+300-y;
        if(n<0)
        {
            cout<<"-"<<i;
            return 0;
        }
        while(n>=100)
        {
            n = n-100;
            s = s+100;
        }
    }
    cout<<s*1.2+n;
}