#include <iostream>


using namespace std;

int a[13];
double sum = 0;
int hand = 0; 

int main(){

	for (int i=1;i<=12;i++)
	{
		cin >> a[i];
	}
	
	bool flag = 1;
	
	
	for (int i=1;i<=12;i++)
	{
		hand += 300;
		if (hand<a[i])
		{
			cout << '-' << i;
			flag = 0;
			break;
		}
		
		hand -= a[i];
		
		int apdf = (hand / 100) * 100;
		
		if (hand>=100)
		{
			sum += (hand / 100);
			hand %= 100;
			
		}

//		cout << hand << " " << apdf << " "<< sum << endl;
		
	}
	
	if (flag == 1) cout << 120 * sum;
	

}