[Leetcode][python] 929: Unique email addresses

• Leetcode 929: Unique email addresses
• Level: Easy
• Link

Unique Email Addresses - LeetCode

My Approach

1. For each email addresses, split the local and domain address
2. If '.' in the local address, remove it.
3. If '+' in the local address, remove strings after the index
4. Combine the local and domain address and add them to a set
5. Return the length of the set

class Solution:
    def numUniqueEmails(self, emails: List[str]) -> int:
        
        res = set()
        for i in range(len(emails)):
            splitidx = emails[i].index('@')
            local = emails[i][0:splitidx]
            domain = emails[i][splitidx:]
            local = local.replace('.', '')
            if '+' in local:
                local = local[0: local.index('+')]
            
            address = local + domain
            res.add(address)
        
        return (len(res))