题解 | #单词倒排#

#include <iostream>
#include <string>
using namespace std;

int main() {
    string str;
    getline(cin, str);
    string word;
    string ans;
    for(int i = 0; i < str.length(); i++){
        if((str[i] >= 'a' && str[i] <= 'z') || (str[i] >= 'A' && str[i] <= 'Z')){
            word += str[i];
            if(i == str.length() - 1) ans = word + " " + ans;
        }
        else{
            if(ans.empty()) ans += word;
            else ans = word + " " + ans;
            word.clear();
        }
    }
    cout << ans << endl;

}