[LeetCode]Unique Email Addresses

这道题没什么好说的，按照题目的要求处理每一个email address最后看有多少unique的即可。代码如下:

	class Solution {
	public:
	int numUniqueEmails(vector<string>& emails) {
	unordered_set<string> set;
	for (auto& email : emails)
	{
	int idx = email.find("@");
	string username = email.substr(0, idx), hostname = email.substr(idx);
	string processedUsername;
	for (auto& c : username)
	{
	if (c == '.')continue;
	if (c == '+')break;
	processedUsername += c;
	}
	string processedEmail = processedUsername + hostname;
	set.insert(processedEmail);
	}
	return set.size();
	}
	};

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