Classify a String under the IPv4 and IPv6 Rules

# Classify a String under the IPv4 and IPv6 Rules Given `queryIP`, return exactly `"IPv4"`, `"IPv6"` or `"Neither"` according to the following rules. An IPv4 address has exactly four decimal groups separated by single dots. Each group represents a value from 0 through 255 and has no leading zeros, except that `"0"` itself is allowed. An IPv6 address for this exercise has exactly eight groups separated by single colons. Each group has one to four hexadecimal characters: digits or letters `a` through `f` in either case. Leading zeros within these groups are allowed. The abbreviated `::` form and mixed dotted/colon forms do not satisfy this exercise's format. ### Interface `class Solution { public: string validIPAddress(string queryIP); };` ### Example 1 ```text Input: queryIP = "203.0.113.7" Output: "IPv4" ``` There are four decimal groups, each within range and without a leading zero. ### Example 2 ```text Input: queryIP = "1:2:3:4:5:6:7:00000" Output: "Neither" ``` The final hexadecimal group has five characters, exceeding the permitted length. ### Constraints - `queryIP` contains only English letters, digits, dots and colons. - No additional string-length bound is specified. ### What a Strong Answer Covers - Exact group counts, nonempty groups and permitted characters. - The different leading-zero rules and decimal range restriction. - Leading or trailing separators, mixed separators and invalid hexadecimal letters. - Safe handling of long invalid inputs without numeric conversion overflow. ```hint Local and whole-string rules Which rules apply to an individual group, and which depend on the complete address? ```