1. 题目

描述
Enter two strings and delete all characters in the second string from the first string

字符串长度：[1, 10^5]

Example 1:
Input:  str=”They are students”，sub=”aeiou”
Output: ”Thy r stdnts”

来源：https://tianchi.aliyun.com/oj/141754208384739500/160296091929219251

2. 解题

• 哈希查找

class Solution {
public:/*** @param str: The first string given* @param sub: The given second string* @return: Returns the deleted string*/string CharacterDeletion(string &str, string &sub) {// write your code hereunordered_set<char> s(sub.begin(), sub.end());string ans;for(char c : str){if(!s.count(c))ans += c;}return ans;}
};

50ms C++

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