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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4. using namespace std;
  5.  
  6. class Solution {
  7.  public:
  8.   int numUniqueEmails(vector<string>& emails) {
  9.     string::iterator it;
  10.     cout << "Normalising the addresses:"<<endl;
  11.     for (int i = 0; i < emails.size(); i++) {
  12.       cout<<"  "<<emails[i]<<"->";
  13.       for (it = emails[i].begin(); it!=emails[i].end() && *it != '@'; it++) {
  14.       	cout<<*it; //ouch
  15.         if (*it == '.') {
  16.           emails[i].erase(it);
  17.           it--;
  18.         }
  19.         if (*it == '+') {
  20.           while (it!=emails[i].end() && *it != '@') {
  21.             emails[i].erase(it);
  22.           }
  23.           break;
  24.         }
  25.       }
  26.       cout<<"->"<<emails[i]<<endl; //ouch
  27.     }
  28.     cout << "Sorting."<<endl; 
  29.     sort(emails.begin(), emails.end());
  30.     cout << "Remove dups."<<endl; 
  31.     for (int j = 0; j < emails.size()-1; j++) {
  32.         if (emails[j] == emails[j + 1]) {
  33.           emails.erase(emails.begin() + j);
  34.           j--;
  35.         }
  36.     }
  37.  
  38.     cout << "Sorted vector:"<<endl; 
  39.     for (auto &x:emails) 
  40.         cout<<"  "<<x<<endl;
  41.     return emails.size();
  42.   }
  43. };
  44.  
  45.  
  46. int main() {
  47. 	//vector<string> v { "hello@x.y", "darkness@y.z", "my.old.friend@z.w" }; 
  48. 	//vector<string> v { "hello@x.y", "darkness@y.z", "hello@x.y" }; 
  49. 	//vector<string> v { "hel.lo@x.y", "darkness@y.z", "hello@x.y", "my.old.friend@z.w","myoldfriend@z.w" }; 
  50. 	vector<string> v { "", "hello", "darkness@", "hello@xy.", "dark.ness@" }; 
  51. 	Solution s; 
  52. 	cout << s.numUniqueEmails(v)<<endl; 
  53.  
  54. 	return 0;
  55. }
Success #stdin #stdout 0s 15248KB
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Standard input is empty
stdout
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Normalising the addresses:
  ->->
  hello->hello->hello
  darkness@->darkness->darkness@
  hello@xy.->hello->hello@xy.
  dark.ness@->dark.ness->darkness@
Sorting.
Remove dups.
Sorted vector:
  
  darkness@
  hello
  hello@xy.
4
https://ideone.com/cZEFBY
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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