EZ!!!!!!!!!!!!!!!!!!

#include<iostream>
using namespace std;
int main(){
double sum=0.0;int m;cin>>m;
for(int i=1;i<=m;i++){
int n;cin>>n;
if(n<=70){
sum+=0.1;
}else{
while(n>=70){
n-=70;
sum+=0.1;
}sum+=0.1;
}
}
printf("%.1f",sum);
return 0;
}