"""
# Problem: solution.py
# Description: 
# Created by ngocjr7 on [2020-03-29 20:29:20]
"""
from __future__ import absolute_import

class Solution:
    def __init__(self):
        self._is_valid = None

    def initialize(self):
        """
            renew solution, prepair for new solution
        """
        pass

    def repair(self):
        pass

    def check_validity(self):
        """
            check if this solution is valid
        :return true if valid
        :rtype boolean
        """
        raise NotImplementedError
