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