HDU2072单词数

#include<iostream>
#include<set>
#include<sstream>
using namespace std;
int main()
{
string s,line;
while(getline(cin,line)&&line[0]!='#')
{
stringstream ss(line);
set<string> dict;
while(ss>>s)
dict.insert(s);
cout<<dict.size()<<endl;
}
return 0;
}