题解

#include<iostream>
int main()
{
    int x,l,e=0;
    ::std::cin>>x;
    while(x){
        ::std::cin>>l;
        if(l>70)
        {
            while(l>0){
                l-=70;
                e++;
            }
        }
        else e++;
        x--;
    }
    ::std::cout<<::std::fixed<<::std::setprecision(1)<<(e/10.0);
    return 0;

![](https://attach.acgo.cn/picture/29f2265b020248aa94a138d8c8c13761.png)