hdu 2072 单词数

#include<iostream>
#include<cstdio>
#include<string>
#include<set>
using namespace std;
int main()
{
freopen("input.txt","r",stdin);
string s,s1;

bool flag;
while(getline(cin,s) && s != "#")
{
set<string>goal;
flag = 0;
s += " ";
for(int i = 0; i < s.size(); i++)
{
if(s[i] != ' ')
{
s1 += s[i];
flag = 1;
}
else if(flag)
{
goal.insert(s1);
s1.clear();
flag = 0;
}
}
cout<<goal.size()<<endl;
}
}