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929. Unique Email Addresses.cpp

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	`1`	`+classSolution {`
	`2`	`+public:`
	`3`	`+intnumUniqueEmails(vector<string>& emails) {`
	`4`	`+ unordered_set<string>res;`
	`5`	`+`
	`6`	`+for (const string& s: emails) {`
	`7`	`+ string e =filter(s);`
	`8`	`+ res.insert(e);`
	`9`	`+ }`
	`10`	`+`
	`11`	`+return res.size();`
	`12`	`+ }`
	`13`	`+`
	`14`	`+ stringfilter(const string& email) {`
	`15`	`+ string res;`
	`16`	`+int i =0, n = email.size();`
	`17`	`+bool ignore =false;`
	`18`	`+for (; i < n; ++i) {`
	`19`	`+if (email[i] =='@') {`
	`20`	`+break;`
	`21`	`+ }elseif (ignore \|\| email[i] =='.') {`
	`22`	`+continue;`
	`23`	`+ }elseif (email[i] =='+') {`
	`24`	`+ ignore =true;`
	`25`	`+ }`
	`26`	`+ res.push_back(email[i]);`
	`27`	`+ }`
	`28`	`+`
	`29`	`+for (; i < n; ++i) {`
	`30`	`+ res.push_back(email[i]);`
	`31`	`+ }`
	`32`	`+return res;`
	`33`	`+ }`
	`34`	`+};`

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