#include <stdio.h>
int main()
{
	int ret = 1;
	int sum = 0;
	int m = 0;
	int a[12];//预算
	for (int i = 0;i < 12;i++)
	{
		scanf_s("%d", &a[i]);
	}
	for (int i = 0;i < 12;i++) {
		m += 300;
		m = m - a[i];
		if (m >= 100)
		{
			int c = m / 100;
			sum += c * 100;
			m = m % 100;
		}

		if (m + 300 < a[i + 1]) {
			printf("-%d", i + 2);
			ret = 0;
			break;
		}
	}

	if (ret == 1) { 
		sum = sum * 1.2 + m;
		printf("%d", sum ); }
	return 0;
}