leetcode 翻转字符串

https://leetcode-cn.com/problems/reverse-words-in-a-string/

TLE代码：

class Solution {

public:

    string reverseWords(string s) {

        stringstream ss(s);

        string buf;

        vector<string> ans;

        while(ss<<buf){

            ans.push_back(buf);

        }

        for(vector<string>::iterator it = ans.end()-;it==ans.begin();it++){

            cout<< *it<<" ";

        }

        return ;

    }

};

亲测用stringstream确实挺慢的．

可以先用reverse 逆序，再挨个单词逆序回来．

巴特西

leetcode 翻转字符串

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