题解

#include<iostream>
using namespace std;

int main()
{
int n;
double sum = 0.0;
cin >> n;
for(int i = 1; i <= n; i++)
{
int x;
cin >> x;
if(x <= 70)
{
sum += 0.1;
}else{
sum += 0.1+(x/70)*0.1;
}
}
cout << sum;
return 0;
}