#include <bits/stdc++.h>
using namespace std;
int a[13];
int sum;
int m;
int main()
{
	
	for(int i=1;i<=12;i++)
	{
		cin>>a[i];
		sum+=300;
		if(sum-a[i]>0)
		{
			m+=int(sum-a[i])/100*100;
			sum-=a[i];
			sum-=int(sum-a[i])/100*100;
		}	
		else
		{
			cout<<'-'<<i<<endl;
			return 0;
		}
	}
	cout<<sum+m*1.2<<endl;
    return 0; 
}

sum是手中的钱 m是妈妈那里钱 a数组是12个月的消耗