HDUOJ2072 单词数

#include <iostream>
#include <cstring>
#include <set>

using namespace std;

int main(){
	string ch;
	//char res[100];
	set<string>ss;
	string s;
	while(getline(cin, ch)&&ch[0]!='#'){
		int len = ch.length();
		ch[len] = ' ';
		for(int i = 0; i <= len; i++){
			if(ch[i] != ' '){
				s += ch[i];
			}
			if(ch[i] == ' '){
				if(s.length())
					ss.insert(s);
				//cout << s << endl;
				s = "";
			}
		}
		cout << ss.size() << endl;
		ss.clear();
		ch="";
	}
	return 0;
}