题解 | #完全二叉树结点数#
完全二叉树结点数
http://www.nowcoder.com/practice/512688d2ecf54414826f52df4e4b5693
这个有意思了：
class Solution:
def nodeNum(self , head ):
# write code here
if head:
return self.nodeNum(head.left) + self.nodeNum(head.right) + 1//简单易理解
else: return 0
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