题目：

题解：

class Solution {public int rob(int[] nums) {int length = nums.length;if (length == 1) {return nums[0];} else if (length == 2) {return Math.max(nums[0], nums[1]);}return Math.max(robRange(nums, 0, length - 2), robRange(nums, 1, length - 1));}public int robRange(int[] nums, int start, int end) {int first = nums[start], second = Math.max(nums[start], nums[start + 1]);for (int i = start + 2; i <= end; i++) {int temp = second;second = Math.max(first + nums[i], second);first = temp;}return second;}
}