Задачі
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Nice problem, but weak test cases. You could add at least one test case where n is a prime >= 10^10. And better if n is a prime closer to 10^18.
Зачем такие сложности,если при n>55 ответ НОЛЬ?
Nice problem, but weak test cases. You could add at least one test case where n is a prime >= 10^10. And better if n is a prime closer to 10^18.
Зачем такие сложности,если при n>55 ответ НОЛЬ?