add 929

README.md

@@ -89,6 +89,7 @@ LeetCode
 |0120|[Triangle](https://leetcode.com/problems/triangle/) | c | [c++](./src/0120-Triangle/0120.cpp) |[python](./src/0120-Triangle/0120.py)|||Medium|
 |0121|[Best Time to Buy and Sell Stock](https://leetcode.com/problems/best-time-to-buy-and-sell-stock/) | c | [c++](./src/0121-Best-Time-to-Buy-and-Sell-Stock/0121.cpp) |[python](./src/0121-Best-Time-to-Buy-and-Sell-Stock/0121.py)|||Easy|
 |0122|[Best Time to Buy and Sell Stock II](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/) | c | [c++](./src/0122-Best-Time-to-Buy-and-Sell-Stock-II/0122.cpp) |[python](./src/0122-Best-Time-to-Buy-and-Sell-Stock-II/0122.py)|||Easy|
+|0123|[Best Time to Buy and Sell Stock III](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iii/) | c | [c++](./src/0123-Best-Time-to-Buy-and-Sell-Stock-III/0123.cpp) |[python](./src/0123-Best-Time-to-Buy-and-Sell-Stock-III/0123.py)|||Hard|
 |0125|[Valid Palindrome](https://leetcode.com/problems/valid-palindrome/) | c | [c++](./src/0125-Valid-Palindrome/0125.cpp) |[python](./src/0125-Valid-Palindrome/0125.py)|||Easy|
 |0126|[Word Ladder II](https://leetcode.com/problems/word-ladder-ii/) | c | [c++](./src/0126-Word-Ladder-II/0126.cpp) |[python](./src/0126-Word-Ladder-II/0126.py)|||Hard|
 |0127|[Word Ladder](https://leetcode.com/problems/word-ladder/) | c | [c++](./src/0127-Word-Ladder/0127.cpp) |[python](./src/0127-Word-Ladder/0127.py)|||Medium|
@@ -166,4 +167,5 @@ LeetCode
 |0923|[3Sum With Multiplicity](https://leetcode.com/problems/3sum-with-multiplicity/) | c | [c++](./src/0923-3Sum-With-Multiplicity/0923.cpp) |[python](./src/0923-3Sum-With-Multiplicity/0923.py)|||Medium|
 |0925|[Long Pressed Name](https://leetcode.com/problems/long-pressed-name/) | c | [c++](./src/0925-Long-Pressed-Name/0925.cpp) |[python](./src/0925-Long-Pressed-Name/0925.py)|||Easy|
 |0926|[Flip String to Monotone Increasing](https://leetcode.com/problems/flip-string-to-monotone-increasing/) | c | [c++](./src/0926-Flip-String-to-Monotone-Increasing/0926.cpp) |[python](./src/0926-Flip-String-to-Monotone-Increasing/0926.py)|||Medium|
-|0927|[Three Equal Parts](https://leetcode.com/problems/three-equal-parts/) | c | [c++](./src/0927-Three-Equal-Parts/0927.cpp) |[python](./src/0927-Three-Equal-Parts/0927.py)|||Medium|
+|0927|[Three Equal Parts](https://leetcode.com/problems/three-equal-parts/) | c | [c++](./src/0927-Three-Equal-Parts/0927.cpp) |[python](./src/0927-Three-Equal-Parts/0927.py)|||Medium|
+|0929|[Unique Email Addresses](https://leetcode.com/problems/unique-email-addresses/) | c | [c++](./src/0925-Long-Pressed-Name/0925.cpp) |[python](./src/0925-Long-Pressed-Name/0925.py)|||Easy|

src/0929-Unique-Email-Addresses/0929.cpp

@@ -0,0 +1,41 @@
+#include <iostream>
+#include <vector>
+#include <string>
+#include <unordered_set>
+using namespace std;
+
+static int x = []() {std::ios::sync_with_stdio(false); cin.tie(0); return 0; }();
+class Solution 
+{
+public:
+    int numUniqueEmails(vector<string>& emails) 
+    {
+        unordered_set<string> result;
+        for (auto& email : emails)
+        {
+            auto at_pos = email.find('@');
+            auto plus_pos = email.find('+');
+            if (plus_pos < at_pos)
+            {
+                auto len = at_pos - plus_pos;
+                email.erase(plus_pos, len);
+                at_pos -= len;
+            }
+            auto dot_pos = email.find('.'); 
+            while (dot_pos < at_pos)
+            {
+                email.erase(dot_pos, 1);
+                at_pos--;
+                dot_pos = email.find('.');
+            }
+            result.insert(email);
+        }
+        return result.size();
+    }
+};
+int main()
+{
+    vector<string> emails = {"[email protected]","[email protected]","[email protected]"};
+    cout << Solution().numUniqueEmails(emails);
+    return 0;
+}

src/0929-Unique-Email-Addresses/0929.py

@@ -0,0 +1,18 @@
+class Solution:
+    def numUniqueEmails(self, emails):
+        """
+        :type emails: List[str]
+        :rtype: int
+        """
+        raw_emails = set()
+        for email in emails:
+            sp_at = email.split('@')
+            pre = sp_at[0].split('+')
+            raw_emails.add(pre[0].replace('.', '') + sp_at[1])
+
+        return len(raw_emails)
+
+
+if __name__ == "__main__":
+    emails = ["[email protected]","[email protected]","[email protected]"]
+    print(Solution().numUniqueEmails(emails))