#include<iostream>
using namespace std;
int main() {
	int e,y=0,c=0,s=0,a=0;
	int i;
	for (i = 0; i < 12; i++) {
		cin >> e;
		if (y + 300 < e) {
			a = i + 1;
		}
		else {
			c = (300 +y- e) / 100;
			y+= 300 - e - 100 * c;
			s += 100 * c;
		}		
	}
	if (a)
		cout << "-" << a;
	else
		cout << 1.2 * s + y;
	return 0;
}