Validate an IPv4 address format (four integers separated by dots, each 0–255 with no leading zeros).

Difficulty: Medium

Phase: 6 · Mixed Logical Challenges

XP Reward: 20 XP

Topics: Mixed Logical Challenges, Medium

Supported Languages: Python, JavaScript, C, C++, Java

Problem Description

Validate IPv4 address format strictly (4 octets 0-255 with no leading zeros). Print 'Valid' or 'Invalid'. Input Format: Read input from standard input (stdin). Output Format: Print the result to standard output (stdout).

Constraints

-10^9 <= N <= 10^9

Examples

Example 1

Input: 172.16.254.1

Output: Valid

Explanation: Sample execution for input 172.16.254.1