```cpp
#include<bits/stdc++.h>
using namespace std;
long double s=0,a;
int main()
{
while(scanf("%Lf",&a)!=EOF)
{
s+=a*1000000;
}
printf("%.5Lf\n",s/1000000);
return 0;
}
```
by sdyzpf @ 2023-11-26 17:06:05
@[sdyzpf](/user/174477) 谢谢，过了·
by GoodLuckCat @ 2023-11-26 17:07:11