#include<iostream>
using namespace std;
int main()
{
	int em[12],nm = 0,mom = 0;//Expect Money, Now Money, MOm's Money
	for(int i = 1;i <= 12;++i)//输入预算
		cin >> em[i];
	for(int i = 1;i <= 12;++i)//i：月份
	{
		nm += 300;
		if(nm - em[i] < 0)//判断钱是否够用
		{
			cout <<"-"<< i<<endl;	
			return 0;
		}
		if(nm - em[i] >= 100)//判断是否给妈妈钱
		{
			nm -= em[i];
			mom += nm - nm % 100;
			nm = nm % 100;	
		}
		else
		{
			nm -= em[i];
		}
			
	}
	nm += mom * 1.2;
	cout << nm;//输出余额
	return 0;	
}