# Print the Vertical Sum in binary Tree .

Objective: Given a binary tree, print it in vertical order sum

What is Vertical Order Sum

as you can see in the example above, [4],[2], [12],[3],[7] are the vertical order sum of the given binary tree.

Approach:

• Do the inorder traversal.
• Take a variable called level, when ever you fo left, do level++ AND when ever you go right do level–.
• With step above we have separated out the levels vertically.
• Now you need to add the elements of each level, so create a TreeMap and the (key,value) pair will be (level,Sum of elements).
• Separate out the vertical levels

At the end iterate through the TreeMap and print the results.

Complete Code:

Output:

```Level -2 Sum : 7
Level -1 Sum : 3
Level 0 Sum : 12
Level 1 Sum : 2
Level 2 Sum : 4
```

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If you find anything incorrect or you feel that there is any better approach to solve the above problem, please write comment.
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