Merge pull request neetcode-gh#2135 from a93a/main

Create 0929-unique-email-addresses.kt

Author: a93a

kotlin/0929-unique-email-addresses.kt

@@ -0,0 +1,17 @@
+class Solution {
+    fun numUniqueEmails(emails: Array<String>): Int {
+        val hset = HashSet<String>()
+        for(email in emails) {
+            var i = 0
+            var res = ""
+            while(email[i] != '+' && email[i] != '@'){
+                if(email[i] != '.') res += email[i]
+                i++
+            }
+            while(email[i] != '@') i++
+            res += email.substring(i,email.length)
+            hset.add(res)
+        }
+        return hset.size
+    }
+}