#include <stdio.h>
#include <stdlib.h>


int main()
{
	int N, sumticket = 0, payout = 0;
	scanf("%d", &N);

	int* C;
	C = (int*)malloc(sizeof(int) * N);

	for (int i = 0; i < N; i++)
	{
		int input;
		scanf("%d", &input);

		C[i] = input;
		sumticket += input;
	}

	for (int i = 0; i < N; i++)
	{
		if (C[i] <= sumticket / 10)
		{
			payout += 30;
		}
	}

	printf("%d", payout);

	return 0;
}