Chef and LCS

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Recently, Chef learned how to solve the Longest common subsequence problem. Being a fan of Ekta Kapoor1, he really likes problems which require finding something kth. Please help him solve one such problem he encountered. Chef wants to know the lexicographically kth longest common subsequence of any two given strings A and B. In other words, let L be the length of LCS(A, B), S be the sorted set o

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solution.cppC++17

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