How do I find this for large N? (N ≤ 1011).
Numbers can be either of the form P * Q or P3, where P and Q are primes.
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How do I find this for large N? (N ≤ 1011).
Numbers can be either of the form P * Q or P3, where P and Q are primes.
Название |
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Problem F.
Thanks! :)
https://en.wikipedia.org/wiki/Prime-counting_function ,
There is The Meissel–Lehmer algorithm, counting number of primes.
Hope it will help you)