Friends of Joey

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As you know Joey loves Rachel, but since Rachel had no feelings for Joey she decided to avoid him by giving him an easy task which obviously is difficult for Joey. Since Joey is eager to talk to Rachel, he gives you his task. The task is to choose two integers A and B and then calculates the greatest common divisor of integers $A!$ and $B!$. Formally, Joey wants to find out GCD(A!, B!). #

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solution.cppC++17

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