题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2072
关于stringstream的介绍https://blog.csdn.net/jllongbell/article/details/79092891
AC代码如下:
#include<bits/stdc++.h>
using namespace std;
int main()
{
int ans;
string str,st;
set<string> m;
while(getline(cin,str))
{
ans=0;
m.clear();
if(str=="#") break;
stringstream ss(str);
while(ss>>st)
{
if(m.count(st)==0)
{
m.insert(st);
ans++;
}
}
cout<<ans<<endl;
}
return 0;
}