#include<bits/stdc++.h>

using namespace std;
using ll=long long;
#define rep2(i, a, n) for(int i = (a); i < (n); i++)
#define rep(i, n) rep2(i,0,n)

int main(){
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  int n;cin>>n;
  int hoge[n],a,cnt=0;
  rep(i,n){
    cin>>a;
    cnt+=a;
    hoge[i]=a;
  }
  cnt/=10;
  int res=0;
  rep(i,n){
    if(hoge[i]<=cnt)res+=30;
  }
  cout<<res<<endl;
}