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@ -88,6 +88,8 @@ int fib(int N) {
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}
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```
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<visual slug='mydata-fib'/>
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这个不用多说了,学校老师讲递归的时候似乎都是拿这个举例。我们也知道这样写代码虽然简洁易懂,但是十分低效,低效在哪里?假设 n = 20,请画出递归树:
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