Chef and his Sequence

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Chef has a sequence of $N$ integers, $A_1, A_2, ... , A_N$. He likes this sequence if it contains a **subsequence** of $M$ integers, $B_1, B_2, ... , B_M$ within it. A subsequence is a sequence that can be derived from another sequence by deleting some or no elements without changing the order of the remaining elements. You will be given a sequence of $N$ integers, $A_1, A_2, ..., A_N$ follow

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solution.cppC++17

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