class Solution: def jumpFloor(self, number): if number==0: return 0 elif number==1: return 1 elif number==2: return 2 else: a,b=1,2 while number>2: a,b=b,a+b number-=1 return b
class Solution: def jumpFloor(self, number): if number==0: return 0 elif number==1: return 1 elif number==2: return 2 else: a,b=1,2 while number>2: a,b=b,a+b number-=1 return b