{# Grading needs an account, so show the task but not a runner
that would fail the moment it is submitted. #}
Kirish
Sonlar qatori: 1, 3, 9, ?
O'rtacha
Qonuniyatni toping va davom ettiring.
Mashqni yechish uchun hisobingizga kiring
Javobingiz tekshiriladi, izoh beriladi va XP yig'iladi.