Package g0301_0400.s0337_house_robber_iii

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    337 - House Robber III\.

    Medium

    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 <code>1, 10<sup>4</sup></code>.

    • <code>0 <= Node.val <= 10<sup>4</sup></code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer rob(TreeNode root)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait