#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
int main(void)
{
    int candidate=0,deposit=0,totalvote=0;
    int vote[150]={0};
    scanf("%d",&candidate);
    for(int i=0;i<candidate;i++)
    {
        scanf("%d",&vote[i]);
        totalvote+=vote[i];
    }
    for(int i=0;i<candidate;i++)
    {
        if(vote[i]<=totalvote/10)
        {
            deposit+=30;
        }
    }
    printf("%d",deposit);
}