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;
}