nherited-code.cpp

#include <iostream>
#include <string>
#include <sstream>
#include <exception>
using namespace std;

/* Define the exception here */
struct BadLengthException : exception 
{
  string s;
  BadLengthException(int n) : s(to_string(n)) {}
  const char *what() const noexcept override 
  {
    return s.c_str();
  }
};


bool checkUsername(string username) 
{
    bool isValid = true;
    int n = username.length();
    if(n < 5) 
    {
        throw BadLengthException(n);
    }
    for(int i = 0; i < n-1; i++) 
    {
        if(username[i] == 'w' && username[i+1] == 'w') 
        {
            isValid = false;
        }
    }
    return isValid;
}

int main() 
{
    int T; cin >> T;
    while(T--) 
    {
        string username;
        cin >> username;
        try 
        {
            bool isValid = checkUsername(username);
            if(isValid) 
            {
                cout << "Valid" << '\n';
            } 
            else 
            {
                cout << "Invalid" << '\n';
            }
        } 
        catch (BadLengthException e) 
        {
            cout << "Too short: " << e.what() << '\n';
        }
    }
    return 0;
}