题解 | #单词倒排#

#include <bits/stdc++.h>
using namespace std;
int main()
{
    char c;
    string ans, word;
    while(cin.get(c))
    {
        if(isalpha(c))
            word+=c;
        else
        {
            if(!ans.empty())
                ans=word+' '+ans;
            else
                ans=word;
            word.clear();
        }
    }
    cout<<ans<<endl;
}