Problem Enumerating Rational Numbers
I don't know how to solve this problem, with the help of Euler's function. Can you explain me the idea for this problem?
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Problem Enumerating Rational Numbers
I don't know how to solve this problem, with the help of Euler's function. Can you explain me the idea for this problem?
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Ok, got accepted.
http://pastebin.com/2rFPsEHx
Ah, you cant calc euler function for 1...n on each test case, too expensive(n * sqrt(n)), precalc it :)
Wow, thnks for that. But it seems like the complexity is O(n*log(log(n)))