#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param number int整型 
# @return int整型
#
class Solution:
    def jumpFloorII(self , number: int) -> int:
        # write code here
        dp=[0]*(number+1)
        dp[1]=1
        for i in range(2,number+1):
            dp[i]=sum(dp[:i])+1
        return dp[number]