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import collections

from typing import List

class Solution:

def rob(self, nums: List[int]) -> int:

if not nums:

return 0

if len(nums) <= 2:

return max(nums)

dp = collections.OrderedDict()

dp[0], dp[1] = nums[0], max(nums[0], nums[1])

for i in range(2, len(nums)):

dp[i] = max(dp[i - 1], dp[i - 2] + nums[i])

return dp.popitem()[1]