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g0201_0300.s0213_house_robber_ii.readme.md Maven / Gradle / Ivy

213\. House Robber II

Medium

You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed. 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 1 (money = 2) and then rob house 3 (money = 2), because they are adjacent houses.

**Example 2:**

**Input:** nums = [1,2,3,1]

**Output:** 4

**Explanation:** Rob house 1 (money = 1) and then rob house 3 (money = 3). Total amount you can rob = 1 + 3 = 4.

**Example 3:**

**Input:** nums = [1,2,3]

**Output:** 3

**Constraints:**

*   `1 <= nums.length <= 100`
*   `0 <= nums[i] <= 1000`