# include<iostream> # include<iomanip> using namespace std; int text(int a){ int cnt; if(a%70==0) cnt = a/70; else cnt = a/70+1; return cnt; } int main(){ int n,m; double sum=0; cin>>n; for(int i=1;i<=n;i++){ cin>>m; sum = sum + text(m)*0.1; } cout<<fixed<<setprecision(1)<<sum<<endl; return 0; }