{ "data": { "question": { "questionId": "468", "questionFrontendId": "468", "boundTopicId": null, "title": "Validate IP Address", "titleSlug": "validate-ip-address", "content": "

Given a string queryIP, return "IPv4" if IP is a valid IPv4 address, "IPv6" if IP is a valid IPv6 address or "Neither" if IP is not a correct IP of any type.

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A valid IPv4 address is an IP in the form "x1.x2.x3.x4" where 0 <= xi <= 255 and xi cannot contain leading zeros. For example, "192.168.1.1" and "192.168.1.0" are valid IPv4 addresses but "192.168.01.1", while "192.168.1.00" and "192.168@1.1" are invalid IPv4 addresses.

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A valid IPv6 address is an IP in the form "x1:x2:x3:x4:x5:x6:x7:x8" where:

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For example, "2001:0db8:85a3:0000:0000:8a2e:0370:7334" and "2001:db8:85a3:0:0:8A2E:0370:7334" are valid IPv6 addresses, while "2001:0db8:85a3::8A2E:037j:7334" and "02001:0db8:85a3:0000:0000:8a2e:0370:7334" are invalid IPv6 addresses.

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Example 1:

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\nInput: queryIP = "172.16.254.1"\nOutput: "IPv4"\nExplanation: This is a valid IPv4 address, return "IPv4".\n
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Example 2:

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\nInput: queryIP = "2001:0db8:85a3:0:0:8A2E:0370:7334"\nOutput: "IPv6"\nExplanation: This is a valid IPv6 address, return "IPv6".\n
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Example 3:

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\nInput: queryIP = "256.256.256.256"\nOutput: "Neither"\nExplanation: This is neither a IPv4 address nor a IPv6 address.\n
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Constraints:

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