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D. Powerful array
time limit per test
5 seconds memory limit per test
256 megabytes input
standard input output
standard output An array of positive integers a1, a2, ..., an is given. Let us consider its arbitrary subarray al, al + 1..., ar, where 1 ≤ l ≤ r ≤ n. For every positive integer s denote by Ks the number of occurrences of
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