Trees find sum at level K

#1

What are the total number of inputs?It has not been specified?

#2

hello @aryamaan1011
yeah total number of input is not specified .
you need to write a recursive to build tree recursively.
every line of input will contain 2 things 1st data , 2nd is number of children.

if number of children is zero then simply return the current node.
if number of child is one then recusively build left subree , assign null to right subtree and return.
otherwise recusively build both left and right subtree and return current node.
check this->
image

#3

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