House Robber II

You are a professional robber planning to rob houses along a street. All houses at this place are arranged in a **circle**. That means the first house is the neighbor of the last one. Meanwhile, adjacent houses have a security system connected, and it will automatically contact the police if two adjacent houses were broken into on the same night. Given an integer array `nums` representing the amount of money of each house, return the maximum amount of money you can rob tonight without alerting the police. **Example 1:** ``` Input: nums = [2,3,2] Output: 3 Explanation: You cannot rob house 0 and house 2 as they are adjacent. ``` **Example 2:** ``` Input: nums = [1,2,3,1] Output: 4 Explanation: Rob house 0 (money = 1) and house 2 (money = 3). Total = 1 + 3 = 4. ``` **Example 3:** ``` Input: nums = [1,2,3] Output: 3 ```