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Dev #250

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6c22457
Random problems in contest
Jul 4, 2019
d8f21bc
refine random problems features
Jul 5, 2019
ce8db9a
merge with RandomProblems
Jul 5, 2019
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22 changes: 21 additions & 1 deletion problem/views/oj.py
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Original file line number Diff line number Diff line change
Expand Up @@ -107,7 +107,27 @@ def get(self, request):
problem_data = ProblemSafeSerializer(problem).data
return self.success(problem_data)

contest_problems = Problem.objects.select_related("created_by").filter(contest=self.contest, visible=True)
# Random problems for every students in contest
random.seed(request.user.id + self.contest.id)

query_set = Problem.objects.select_related("created_by").filter(contest=self.contest, visible=True).all()
low_problems_query_set = query_set.filter(difficulty='Low')
low_problems_query_set_id = list(low_problems_query_set.values_list('_id', flat=True))
low_selected_id = random.sample(low_problems_query_set_id, 3)
contest_low_problems = low_problems_query_set.filter(_id__in=low_selected_id)

mid_problems_query_set = query_set.filter(difficulty='Mid')
mid_problems_query_set_id = list(mid_problems_query_set.values_list('_id', flat=True))
mid_selected_id = random.sample(mid_problems_query_set_id, 2)
contest_mid_problems = mid_problems_query_set.filter(_id__in=mid_selected_id)

high_problems_query_set = query_set.filter(difficulty='High')
high_problems_query_set_id = list(high_problems_query_set.values_list('_id', flat=True))
high_selected_id = random.sample(high_problems_query_set_id, 0)
contest_high_problems = high_problems_query_set.filter(_id__in=high_selected_id)

contest_problems = contest_low_problems | contest_mid_problems | contest_high_problems

if self.contest.problem_details_permission(request.user):
data = ProblemSerializer(contest_problems, many=True).data
self._add_problem_status(request, data)
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