正如我所料，这代码根本 AC 不了!

> #include<iostream>
> #include "math.h"
> #include <vector>
> using namespace std;
> using std::vector;
> 
> int main()
> {
> 	vector<double> v;
> 	double x;
> 	int n;
> 	const double r=0.577218;
> 	while(cin>>x)
> 	{
> 		if(x!=0.0)
> 		 v.push_back(x);
> 		else
> 			break;
> 	}
> 	for(vector<double>::iterator it=v.begin();it!=v.end();it++)
> 	{
> 	    double l=exp(*it+1-r)-1;
> 		n=(int)(l+0.5);
> 		cout<<n<<" card(s)"<<endl;
> 	}
> 	return 0;
> }