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变态青蛙跳问题.py #3

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kyuer opened this issue Aug 30, 2018 · 1 comment

kyuer commented Aug 30, 2018

如果是等比数列求和，解法是2^n - 1
return 2**n-1 ,与正确答案不符合。
所以f(n)=f(n-1)+f(n-2)+...+f(1)+f(0)
因为f(n-1)=f(n-2)+f(n-3)+...+f(1)+f(0)
f(0)=1,不是太懂，望指教。

Simon717 commented Apr 10, 2019

因为f(0)=f(1)=1 少加了一个1

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