Leetcode524—— 通過删除字母比對到字典裡最長單詞（雙指針）

題目連結：https://leetcode-cn.com/problems/longest-word-in-dictionary-through-deleting/

思路：對數組每個字元串采用雙指針判斷

class Solution {
public:
    string findLongestWord(string s, vector<string>& d) {
        int s_len=s.size();
        string result="";
        for(auto str:d)
        {
            int len_str=str.size();
            if(result.size()>len_str||(result.size()==len_str&&result<=str))continue;
            int i=0;
            int j=0;
            while(i<s_len&&j<len_str)
            {
                if(s[i]==str[j])
                {
                    j++;
                }
                i++;
            }
            if(j==len_str)
                result=str;
        }
        return result;
    }
};