#include <stdio.h>

int main() {
	int n, c[100], s = 0, p = 0, i;

	scanf("%d", &n);
	for (i = 0; i < n; i++) {
		scanf("%d", &c[i]);
		s += c[i];
	}
	for (i = 0; i < n; i++) {
		if (c[i] <= s / 10) p += 30;
	}

	printf("%d\n", p);
	return 0;
}