include [HTML_REMOVED]

include [HTML_REMOVED]

include [HTML_REMOVED]

include [HTML_REMOVED]

using namespace std;

int main()
{
//cin 不能读空格，只能读到I
//getline 读完了，是I AM A STUDENT
//用stringstream先应用头文件[HTML_REMOVED]
//stringstream是把I AM A STUDENT切分成四段I 和AM和A和STUDENT
int cnt=0;
string a,str;
getline(cin,a);
stringstream ssin(a);
while(ssin>>str)cnt++;
cout << cnt;

return 0;

}