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Given a binary tree, the task is to find the maximum path sum. The path may start and end at any node in the tree.

**Example 1:**

**Input:
** 10
/ \
2 -25
/ \ / \
20 1 3 4
**Output: **32**
Explanation: **Path in the given tree goes
like 10 , 2 , 20 which gives the max
sum as 32.

**Example 2:**

**Input:
** 10
/ \
2 5
\
-2
**Output: **17**
Explanation: **Path in the given tree goes
like 2 , 10 , 5 which gives the max sum
as 17.

**Your Task:**

You don't need to take input or print anything. Your task is to **complete **the function **findMaxSum() **that takes **root **as input and returns max sum between any two nodes in the given Binary Tree.

**Expected Time Complexity: **O(N).

**Expected Auxiliary Space: **O(Height of the Tree).

**Constraints:**

1 ≤ Number of nodes ≤ 10^{3}

1 ≤ |Data on node| ≤ 10^{4}

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Maximum path sum from any node

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