Find sum at level k trees

[Dhruv-Miglani-2090236747707980 (Dhruv Miglani)]

can you plz explain how are the inputs taken in this question. i didnt understand the sample input

[priyanka123 (Priyanka Daryani)]

Hi dhruv
Please refer this

How can I accept the input

I wanted to know how can I make the buildTree() function to take the input. Like I at least wanted to know based on the input given how the BT is constructed. With context to this: 1 2 2 2 3 0 4 0 5 2 6 0 7 0 2 Output: 20

[Dhruv-Miglani-2090236747707980 (Dhruv Miglani)]

couldn’t understand…plz elaborate

[priyanka123 (Priyanka Daryani)]

Hey it is like
Level 0: 1
Level 1: 2 5
Level 2: 3 4 6 7
You can think of it as 1 has 2 children
Then 2 has 2 children (with 1 as root)
Then follow children of 2 which are leaf nodes
Then comes second child of 1 i.e 5 which has 2 children
Finally we have 2 children of 5 that are 6 and 7 which are leaf nodes
At last level is given and that is 2 so sum at level 2 is 20…

Please tell me specifically what you did not get in this?

[priyanka123 (Priyanka Daryani)]

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