#include<bits/stdc++.h>
using namespace std;
int ans,l;
int main()
{
	for(int i=1;i<=12;i++)
	{
		int a;
		cin>>a;
		ans+=300;
		ans-=a;
		if(ans/100>0)
		{
			l+=ans/100*100;
			ans=ans-ans/100*100;
		}
		else if(ans<0)
		{
			cout<<"-"<<i;
			return 0;
		}
	}
	cout<<ans+l/120*100;
	return 0;
}