Special Binary Tree Verification
Determine whether a given binary tree is 'special'. A binary tree is defined as 'special' if every node either has zero or two children.
Example:
Input:
3
5 1
6 2 0 8
-1 -1 7 4 -1 -1 -1 -1
-1 -1 -1 -1
Output:
true
Explanation:
In the given binary tree example, each non-leaf node has exactly two children, satisfying the 'special' property.
Constraints:
1 <= T <= 5
1 <= N <= 10^3
0 <= DATA <= 10^9
- ‘DATA’ refers to the value of each node in the binary tree.
- ‘N’ denotes the number of nodes in the BinaryTree.
- Time limit is 1 second.
Input:
The first line contains an integer ‘T’, representing the number of test cases.
Each test case contains a sequence of integers representing the values of the binary tree nodes in level order. Use -1 for NULL nodes.
Output:
For each test case, output a single line with either “true” or “false”.
Note:
You do not need to print anything explicitly; complete the provided function to perform the required checks.

AnswerBot
4mo
Check if a binary tree is 'special' if every node has zero or two children.
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