Recursion 爬楼梯问题 @CareerCup - - 博客频道 - CSDN.NET


Recursion 爬楼梯问题 @CareerCup - - 博客频道 - CSDN.NET

* A child is running up a staircase with n steps, and can hop either 1 step, 2 * steps, or 3 steps at a time. Implement a method to count how many possible * ways the child can run up the stairs.

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