用STL比较快
#include<iostream>
#include<set>
#include<sstream>
using namespace std;
set<string>dict;
int main()
{
string s,buf;
while(getline(cin,s))
{
dict.clear();
if(s[0]=='#')
break;
stringstream ss(s);
while(ss>>buf) dict.insert(buf);
cout<<dict.size()<<endl;
}
return 0;
}
