求大佬帮忙！！！

#include<bits/stdc++.h>
using namespace std;
int a[11000];
int main(){
	int n;
    double sum=0;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i];        
    }
    for(int i=1;i<=n;i++){
        if(a[i]<=70){
            sum+=0.1;
        }else if(a[i]%70==0){
            sum=sum+(a[i]*1.0/70)*0.1;
        }else{
            sum=sum+(a[i]*1.0/70+1)*0.1;
        }     
    }
    printf("%.1f",sum);
	return 0;
}