#34895: _cpp
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(Reach the pinnacle)
理解遞迴的概念,即可解出此題
if (x == 1),回傳1(此為中止條件)
若x為偶數,回傳F(num / 2),反之,回傳F(num - 1) + F(num + 1)
F:代表函數名稱