题解

#include<bits/stdc++.h>
using namespace std;
int n,a[1001];
double num;
int main(){
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i];
        if(a[i]<=70)num+=0.1;
        else{
            num+=a[i]/70*0.1;
            if(a[i]%70!=0)num+=0.1;
        }
    }
    cout<<num;
    return 0;
}