Тест:
{1}
{1}
Ответ жюри: 2
Количество перестановок с каким-то свойством больше, чем количество перестановок вообще.
UPD: Они уже заметили.
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TC SRM 665 Medium
Revision ru2, by Um_nik, 2015-08-11 15:37:18
History
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