337. House Robber III
Medium
7.5K
114

The thief has found himself a new place for his thievery again. There is only one entrance to this area, called `root`.

Besides the `root`, each house has one and only one parent house. After a tour, the smart thief realized that all houses in this place form a binary tree. It will automatically contact the police if two directly-linked houses were broken into on the same night.

Given the `root` of the binary tree, return the maximum amount of money the thief can rob without alerting the police.

Example 1:

```Input: root = [3,2,3,null,3,null,1]
Output: 7
Explanation: Maximum amount of money the thief can rob = 3 + 3 + 1 = 7.
```

Example 2:

```Input: root = [3,4,5,1,3,null,1]
Output: 9
Explanation: Maximum amount of money the thief can rob = 4 + 5 = 9.
```

Constraints:

• The number of nodes in the tree is in the range `[1, 104]`.
• `0 <= Node.val <= 104`
Accepted
330.6K
Submissions
613.1K
Acceptance Rate
53.9%

Seen this question in a real interview before?
1/4
Yes
No

Discussion (0)

Related Topics