<p>Given a string <code>queryIP</code>, return <code>&quot;IPv4&quot;</code> if IP is a valid IPv4 address, <code>&quot;IPv6&quot;</code> if IP is a valid IPv6 address or <code>&quot;Neither&quot;</code> if IP is not a correct IP of any type.</p>

<p><strong>A valid IPv4</strong> address is an IP in the form <code>&quot;x<sub>1</sub>.x<sub>2</sub>.x<sub>3</sub>.x<sub>4</sub>&quot;</code> where <code>0 &lt;= x<sub>i</sub> &lt;= 255</code> and <code>x<sub>i</sub></code> <strong>cannot contain</strong> leading zeros. For example, <code>&quot;192.168.1.1&quot;</code> and <code>&quot;192.168.1.0&quot;</code> are valid IPv4 addresses while <code>&quot;192.168.01.1&quot;</code>, <code>&quot;192.168.1.00&quot;</code>, and <code>&quot;192.168@1.1&quot;</code> are invalid IPv4 addresses.</p>

<p><strong>A valid IPv6</strong> address is an IP in the form <code>&quot;x<sub>1</sub>:x<sub>2</sub>:x<sub>3</sub>:x<sub>4</sub>:x<sub>5</sub>:x<sub>6</sub>:x<sub>7</sub>:x<sub>8</sub>&quot;</code> where:</p>

<ul>
	<li><code>1 &lt;= x<sub>i</sub>.length &lt;= 4</code></li>
	<li><code>x<sub>i</sub></code> is a <strong>hexadecimal string</strong> which may contain digits, lowercase English letter (<code>&#39;a&#39;</code> to <code>&#39;f&#39;</code>) and upper-case English letters (<code>&#39;A&#39;</code> to <code>&#39;F&#39;</code>).</li>
	<li>Leading zeros are allowed in <code>x<sub>i</sub></code>.</li>
</ul>

<p>For example, &quot;<code>2001:0db8:85a3:0000:0000:8a2e:0370:7334&quot;</code> and &quot;<code>2001:db8:85a3:0:0:8A2E:0370:7334&quot;</code> are valid IPv6 addresses, while &quot;<code>2001:0db8:85a3::8A2E:037j:7334&quot;</code> and &quot;<code>02001:0db8:85a3:0000:0000:8a2e:0370:7334&quot;</code> are invalid IPv6 addresses.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre>
<strong>Input:</strong> queryIP = &quot;172.16.254.1&quot;
<strong>Output:</strong> &quot;IPv4&quot;
<strong>Explanation:</strong> This is a valid IPv4 address, return &quot;IPv4&quot;.
</pre>

<p><strong class="example">Example 2:</strong></p>

<pre>
<strong>Input:</strong> queryIP = &quot;2001:0db8:85a3:0:0:8A2E:0370:7334&quot;
<strong>Output:</strong> &quot;IPv6&quot;
<strong>Explanation:</strong> This is a valid IPv6 address, return &quot;IPv6&quot;.
</pre>

<p><strong class="example">Example 3:</strong></p>

<pre>
<strong>Input:</strong> queryIP = &quot;256.256.256.256&quot;
<strong>Output:</strong> &quot;Neither&quot;
<strong>Explanation:</strong> This is neither a IPv4 address nor a IPv6 address.
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>queryIP</code> consists only of English letters, digits and the characters <code>&#39;.&#39;</code> and <code>&#39;:&#39;</code>.</li>
</ul>

class Solution {
public:
    string validIPAddress(string queryIP) {
       vector<string> splits = split(queryIP, '.'); 
       bool isIPV4 = false;
       if (splits.size()==4) {
            isIPV4 = true;
            for (string split: splits) {
                if (!validIPV4Seg(split)) {
                    isIPV4 = false;
                    break;
                }
            }
       }
       
        splits = split(queryIP, ':'); 
        bool isIPV6 = false;
        if (splits.size()==8) {
            isIPV6 = true;
            for (string split: splits) {
                if (!validIPV6Seg(split)) {
                    cout << split << endl;
                    isIPV6 = false;
                    break;
                }
            }   
        }

       if (isIPV4) {
            return "IPv4";
       } 
        if (isIPV6) {
            return "IPv6";
        }
        return "Neither";

    }

    bool validIPV6Seg(string s) {
        if (s.size()>4 || s.size()==0) {
            return false;
        }

        for (char c: s) {
            if (!((c>='a'&&c<='f') || (c>='A'&&c<='F') || (c>='0'&&c<='9'))) {
                return false;
            }
        }
        return true;
    }

    bool validIPV4Seg(string s) {
        if (s[0]=='0') {
            return s.size()==1 ? true:false;
        }
        cout << s << " ";
        int number = 0;
        try {
            size_t pos;
            number = stoi(s, &pos);
            if (pos != s.size()) {
                return false;
            }
        } catch (const invalid_argument& e) {
            cout << "yo";
            return false;
        } catch (const out_of_range& e) {
            cout << "yo2";
            return false;
        }
        cout << number << endl;
        if (number<0||number>255) {
            return false;
        }
        return true;
    }

    vector<string> split(string s, char d) {
        vector<string> result;
        int left = 0;
        int count = 0;
        for (int i=0; i<s.size(); i++) {
            if (s[i]==d) {
                string res = s.substr(left, count);
                cout << res << endl;
                result.push_back(res);
                count=0;
                left=i+1;
                continue;
            }
            count++;
        }
        string res = s.substr(left, count);
        cout << res << endl;
        result.push_back(res);
        return result;
    }
};
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