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Amit and Nitin

Amit and Nitin are very good friends. Amit gives Nitin a simple problem to solve. Since Nitin is not very good at coding, help him solve the problem. There are some special numbers where the ith special number is represented as: S1=2 S2=7 For i>=3 Si=Si-1 + 3*Si-2 when i%2 = 1 Si=Si-1 + 7 when i%2 = 0 Thus some initial special numbers are 2,7,13,20... Now Nitin has to answer for any given

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L1 Observation
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solution.cppC++17

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