Using stl in this question

In these questions of lists, are we allowed to use stl or we have to use our list data structure

you can use stl
there is no restrictions

try to solve using both

sir, what is the problem with this function. I am using my own list object class which was taught by sir. My function for kAppend starts at line 81 of the code that I have sent

also pls share your solution of how you will solve it using the c++ stl library as I can’t even start thinking on how to use the stl library of list

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