static void Main(string[] args)
{
//IProblem problem = new StringReverse();
//IProblem problem = new RemoveCosecutiveLetters();
//IProblem problem = new StringRotation();
//IProblem problem = new MissingNumber();
//IProblem problem = new MissingNumbers();
IProblem problem = new ValidParentheses();
problem.Solve();
}
