题解

#include<iostream>
#include<cmath>
using namespace std;
int n;
double num,x[105];
int main(){
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>x[i];
        if(x[i]<=70)
        {
            num+=0.1;
        }
        else
        {
            num+=ceil(x[i]/70)*0.1;
        }
    }
    cout<<num;
}