#include<stdio.h> #include<string.h> #include<stdlib.h> int main(void){ int n,c[105]; int sum=0; scanf("%d",&n); for(int i=0;i<n;i++){ scanf("%d",&c[i]); sum=sum+c[i]; } sum=sum/10; int yes=0; for(int i=0;i<n;i++){ if(sum>=c[i]){yes++;} } printf("%d\n",yes*30); }