#define F(i,n) for(int i = 0;i < n;i++)
#include <stdio.h>
int x(const int a[],int n){int t = 0;F(i,n) t += a[i];return(t);}
int main (void){int n,r=0;int c[100];scanf("%d",&n);F(i,n)scanf("%d",&c[i]);F(i,n){if(c[i]<=x(c,n)*0.1)r+=30;}printf("%d",r);return(0);}