public class Main1089 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        final int K = 300;
        int[] a = new int[12];
        int sum = 0;
        int counts = 0;
        for (int i = 0; i < 12; i++) {
            a[i] = scan.nextInt();
        }

        for (int i = 0; i < 12; i++) {
            sum = sum + K - a[i];
            if (sum < 0) {
                System.out.println(-(i + 1));
                break;
            } else {
                int x = sum / 100;
                counts = counts + (100 * x);
                sum = sum - (100 * x);
            }

            if (i == 11) {
                double y = counts * 1.2;
                System.out.println((int) y);
            }
        }
    }
}