Asosiy mazmunga o'tish
{# Grading needs an account, so show the task but not a runner that would fail the moment it is submitted. #}
Sonlar qatori: 2, 6, 12, 20, ? Qiyin

Sonlar orasidagi farqqa e'tibor bering.

Mashqni yechish uchun hisobingizga kiring

Javobingiz tekshiriladi, izoh beriladi va XP yig'iladi.

Kirish