题目：

题解：

class Solution {
public:int rob(vector<int>& nums) {if (nums.empty()) {return 0;}int size = nums.size();if (size == 1) {return nums[0];}int first = nums[0], second = max(nums[0], nums[1]);for (int i = 2; i < size; i++) {int temp = second;second = max(first + nums[i], second);first = temp;}return second;}
};