public async Task <IActionResult> ChangeExpected(int pid, int sid, ChangeExpectedModel model)
{
var it = await Submissions.FindAsync(sid);
if (it == null || it.ProblemId != pid)
{
return(NotFound());
}
it.ExpectedResult = model.Verdict == -1 ? default(Verdict?) : (Verdict)model.Verdict;
it.Language = model.Language;
await Submissions.UpdateAsync(it);
return(RedirectToAction(nameof(Detail)));
}