#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <math.h>
#include <string.h>

int main()
{
	int n = 0;
	int persons[100] = { -1 };
	int cnt = 0;
	int maney = 0;

	scanf("%d", &n);
	
	for (int i = 0;i < n;i++)
	{
		scanf("%d", &persons[i]);
		cnt += persons[i];
	}

	cnt /= 10;

	for (int i = 0;i < n;i++)
	{
		if (persons[i] <= cnt)
		{
			maney += 30;
		}
	}

	printf("%d\n", maney);

	return 0;
}