Given a binary tree containing N+1 with N edges nodes and an integer X. Your task is to complete the function countSubtreesWithSumX() that returns the count of the number of subtress having total node’s data sum equal to a value X.
Example: For the tree given below:
/ \ / \
9 8 -4 7
Subtree with sum 7:
and one node 7.
First line of input contains the number of test cases T. For each test case, there will be only a single line of input which is a string representing the tree as described below:
The values in the string are in the order of level order traversal of the tree where, numbers denotes node values, and a character “N” denotes NULL child.
For the above tree, the string will be: 1 2 3 N N 4 6 N 5 N N 7 N
For each test case count the number of subtrees with given sum.
The task is to complete the function countSubtreesWithSumX() which check if there exists a subtree with sum x.
1 <= T <= 100
1 <= N <= 103
-103 <= Node Value <= 103
5 -10 3 9 8 -4 7
1 2 3
Testcase 1: Subtrees with sum 7 are [9, 8, -10] and .
Testcase 2: No subtree has sum equal to 5.
Note:The Input/Ouput format and Example given are used for system's internal purpose, and should be used by a user for Expected Output only. As it is a function problem, hence a user should not read any input from stdin/console. The task is to complete the function specified, and not to write the full code.
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