[leetcode] 929. Unique Email Addresses (easy)

时间:2024-11-09 19:06:32

统计有几种邮箱地址。

邮箱名类型:local@domain

规则:1. local中出现"."的,忽略。 a.bc=abc

   2. local中出现"+"的,+以及之后的local全部忽略。 a+bc=a

思路:

利用set存,水题没啥好说的

Runtime: 20 ms, faster than 96.66% of C++ online submissions for Unique Email Addresses.

class Solution
{
public:
int numUniqueEmails(vector<string> &emails)
{
set<string> aset;
for (string s : emails)
{
bool local = true;
bool hasPlus = false;
string temp="";
for (char c : s)
{
if (c == '@')
local = false;
if (c == '+' && local)
hasPlus = true;
if ((c == '.' || hasPlus) && local)
continue;
temp.push_back(c);
}
aset.insert(temp);
}
return aset.size();
}
};