Defanging an IP Address — LeetCode 1108 Python Solution
EasyString
- Problem
- #1108
- Pattern
- Hash Map
- Reading time
- 2 min
- Source
- leetcode.com
The problem
Given a valid (IPv4) IP address, return a defanged version of that IP address. A defanged IP address replaces every period "." with "[.]".
Example
- Input
- address = "1.1.1.1"
- Output
- "1[.]1[.]1[.]1"
Python solution
Python
class Solution:
def defangIPaddr(self, address: str) -> str:
return address.replace('.', '[.]')Complexity
| Measure | Complexity |
|---|---|
| Time | O(n), where n is the length of the string |
| Space | O(1) auxiliary |
Pattern: Hash Map
Trade memory for time: remember what you have seen so the second pass never happens. LeetCode 1108. Defanging an IP Address is filed here because the reference solution below belongs to the algorithm family this hub collects, even though its LeetCode tags point elsewhere.
The hash map guide has the Python template for the pattern and the 709 LeetCode problems that use it.
Related problems
Frequently asked questions
- How hard is LeetCode 1108. Defanging an IP Address?
- LeetCode 1108. Defanging an IP Address is rated Easy on LeetCode.
- What is the time complexity of LeetCode 1108. Defanging an IP Address?
- The Python solution on this page runs in O(n), where n is the length of the string.
- What is the space complexity of LeetCode 1108. Defanging an IP Address?
- The Python solution on this page uses O(1) auxiliary space.
- What topics does LeetCode 1108. Defanging an IP Address cover?
- LeetCode 1108. Defanging an IP Address is tagged String on LeetCode.