How to enter custom input

#1

I’m not able to analyse that how to enter the custom input in input box to check my output please help me out with this

#2

try to test it with input as
1 2 3 -1
4 2 3 -1

not the one given,
Consider these linked lists :
1 -> 2 -> 3 -> null
:arrow_upper_right:
4

(This is not the actual input that will be provided but rather a description of it)

Hope this helps :slight_smile: