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Check for Balanced Tree
Easy Accuracy: 50.11% Submissions: 100k+ Points: 2

Given a binary tree, find if it is height balanced or not.
A tree is height balanced if difference between heights of left and right subtrees is not more than one for all nodes of tree.

A height balanced tree
1
/     \
10      39
/
5

An unbalanced tree
1
/
10
/
5

Example 1:

Input:
1
/
2
\
3
Output: 0
Explanation: The max difference in height
of left subtree and right subtree is 2,
which is greater than 1. Hence unbalanced


Example 2:

Input:
10
/   \
20   30
/   \
40   60
Output: 1
Explanation: The max difference in height
of left subtree and right subtree is 1.
Hence balanced.


You don't need to take input. Just complete the function isBalanced() that takes root node as parameter and returns true, if the tree is balanced else returns false.

Constraints:
1 <= Number of nodes <= 105
0 <= Data of a node <= 106

Expected time complexity: O(N)
Expected auxiliary space: O(h) , where h = height of tree