HackerEarth Sahil computer address problem solution

1. It has exactly 4 non-empty parts separated by 3 dots, like: 255 [dot] 255 [dot] 255 [dot] 255
2. The decimal value of each part of the IP address should never exceed 255 and never be less than zero.

#include<bits/stdc++.h>
using namespace std;
 
int main()
{
    int dots = 0, i = 0;
    string s, octet_str;
    cin >> s;
    
  bool is_valid = true;
  while (1)
    {
      char c = s[i++];
      if (c == '.' || c == 0)
      {
        if (octet_str.empty())
        {
          is_valid = false;
          break;
      }
      
      int octet_value = stoi(octet_str);
      if (octet_value < 0 || octet_value > 255)
      {
        is_valid = false;
          break;
      }
    
      if (c == 0)
        break;
        
      ++dots;
      octet_str.clear();
    }
    else
    {
      octet_str += c;
    }
  }
  
  if (dots != 3)
  {
    is_valid = false;
  }
  
  cout << (is_valid ? "YESn" : "NOn");
    return 0;
}