题解 | #跳台阶扩展问题#
跳台阶扩展问题
https://www.nowcoder.com/practice/953b74ca5c4d44bb91f39ac4ddea0fee
import sys
n = int(input().strip())
dp = [0] * (n+2)
dp[0] = 0
dp[1] = 1
dp[2] = 2
#dp[n] = dp[n-1] + dp[n-2] + ... + dp[2] + dp[1] + dp[0]
for i in range(n+1):
for j in range(n-1,1,-1): #j从n-1 到0
dp[i] += dp[j]
print(dp[n])
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