How to take input in this and regarding ans

#1

How can I take input in this as the number of inputs are not specified.
if left node is null like in the example
if 4 is null then will the left view be
1 2 5
?

#2

Hey @Vishu_1801
Level order input for the binary tree will be given.
-1 denote No child

#3

What abt this??
if left node is null like in the example
if 4 is null then will the left view be
1 2 5
?

#4 
             1
          /      \
       2           3
    /     \           \
   4       5           6

When viewed from the left , we would see the nodes 1,2 and 4.