#include<stdio.h>
#include<string.h>
#include<math.h>
int a[20];
int main()
{
	int total = 0, money = 0;
	int t;
	for (int i = 1; i <= 12; i++)
	{
		scanf("%d", &a[i]);
	}
	for (int i = 1; i <= 12; i++)
	{
		money += 300 - a[i];
		if (money < 0)
		{
			printf("-%d", i);
			return 0;
		}
		t = money /100;
		total += t;
		money -= 100 * t;
	}
	printf("%d", (int)(money + 1.2 * total*100));
	return 0;
}