Chef and the Number Sequence

CodeChefRating 3031Open on judge ↗

Chef has a sequence A consisting of N integers each lying between 1 and K, both inclusive. Now he wants to construct another sequence B of the same length also containing integers between 1 and K (again, both inclusive). Find out in how many ways he can construct the sequence B, such that the length of Longest Common Subsequence (LCS) of A and B is exactly L. As the answer could be large, print it

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solution.cppC++17

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