1. You are given a partially written GenericTree class. 2. You are required to complete the body of size function. The function is expected to count the number of nodes in the tree and return it. 3. Input and Output is managed for you.
Input Format
Input is managed for you
Output Format
Output is managed for you
Constraints
None
Notice
Try First, Check Solution later
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Input
12 10 20 -1 30 50 -1 60 -1 -1 40 -1 -1
Output
6