class Solution:
def jumpFloor(self, number):
# write code here
if number == 1:
return 1
if number == 2:
return 2
if number > 2:
a = 1
b = 2
for i in range(1, number): ## 注意这里的循环条件跟斐波那契数列做对比
a, b = b, a+b
return a
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