Inherited_code.cpp

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

class BadLengthException
{
private :
    int n;
public :
    BadLengthException(int num)
    {
        n = num;
    }

    int what()
    {
        return n;
    }
};

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;
}