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Write a method named MemoryNumberGame2 (similar to the previous exercise, memoryNumberGame). The only difference between this exercise and the previous one is that we will pass very large values for the number of iterations in the sequence. Specifically, your code must be efficient enough to compute the 30000000th value in the sequence quickly.

(This exercise is based on the Advent of Code 2020, day 15.)

Method: Write a C# method as described, not a complete program or class.

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