given an integer $$$n$$$, find the number of $$$(i,j,k)$$$ so that:
$$$1<i<j<k<=n$$$.
$$$i*j*k$$$ is a perfect square.
$$$3<n<=10^5$$$
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Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
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Codeforces (c) Copyright 2010-2024 Михаил Мирзаянов
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Время на сервере: 30.11.2024 02:30:49 (l3).
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Im dumb so pls don't take this seriously though. I can now think of a O(N*sqrt(N)) solution, would it be exceeded time limit cause u did not mention the time.
the time limit 1.5s
well, 1e5*1e3=1e8 (could be less) might still get the job done.
what's your approach (help me pls)
It would probably be okay even with just 1 second TL, $$$n$$$ is only $$$10^5$$$, not even $$$2 \cdot 10^5$$$ or something.
can you give me the idea of your solution