All right, this is what's called a recurrence relation, there are actually cool ways to solve them. We can kind of eyeball it.
好，这就是所谓的递归关系，也就是解决问题的相当好的办法，我们可以来看看。
All right, this is what's called a recurrence relation, there are actually cool ways to solve them. We can kind of eyeball it.
好，这就是所谓的递归关系，也就是解决问题的相当好的办法，我们可以来看看。
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