Validation of IPv4 Address with Subnet Mask

You are given a string that represents an IPv4 address with a subnet mask. The valid format is x.x.x.x/y where each x is a decimal number and y is the subnet mask.

The rules for validity are:

• Each x must satisfy \(0 \leq x \leq 255\).
• The subnet mask y must satisfy \(0 \leq y \leq 32\).
• The IP address must consist of exactly four parts separated by dots, and the subnet mask must be provided after a single slash.

For example:

• 192.168.1.1/24 is valid.
• 256.256.256.256/33 is invalid.

Your task is to implement a program that reads an input string from standard input, determines whether it is a valid IPv4 address with a subnet mask, and prints True if it is valid or False if it is not.

inputFormat

The input consists of a single line string from stdin that represents the IPv4 address with its subnet mask in the format x.x.x.x/y.

outputFormat

Output a single line to stdout: print True if the string is a valid IPv4 address with subnet mask, otherwise print False.

192.168.1.1/24

True