About Sum in the question

#1

How is this input given ?If the second line is level then sum should be 8?Please explain

#2

Hi Apoorve ,
This particular problem asks you to take a generic tree input . A generic tree is a tree where any node can have any number of children (unlike binary trees where a node can have atmost 2 children).

The first integer in each row indicates the data at the node whereas the second integer indicates the no of children that node has .

Refer to this code for the input function - https://ide.codingblocks.com/s/90995

As for the sample testcase given in the problem
1 2
2 2
3 0
4 0
5 2
6 0
7 0
2

Here the tree looks like

                             1                                 Level 0
                        /          \
                      2              5                         Level 1
                   /      \       /     \
                  3       4      6        7                    Level 2

Sum at Level 2 = 3 + 4 + 6 + 7 = 20

Hit like if you understand.

#3

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