public ResultController()
{
blProblem = new ProblemBL(db);
blSubmit = new StudentSubmitBL(db);
blContest = new ContestBL(db);
commentBL = new CommentBL(db);
}
public ProblemController()
{
commentBL = new CommentBL(db);
problemBL = new ProblemBL(db);
}