#include<bits/stdc++.h> using namespace std; int main() { int n,a[10000]; cin>>n; double sum=0; for(int i=1; i<=n; i++) { cin>>a[i]; if(a[i]<=70) { sum+=0.1; } else if(a[i]%70==0) { sum+=a[i]/70*0.1; } else { sum+=a[i]/70*0.1+0.1; } } cout<<fixed<<setprecision(1)<<sum; }