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