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Both are wrong IMHO.
'position' variable could take value 0 according to the constraints of the problem. That means that you have to insert the data in the head of the list. But in your code you are inserting in position 1 when the 'position' value is 0. Your code behaves the same when 'position' is 1 and when 'position' is 0.
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Insert a node at a specific position in a linked list
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Both are wrong IMHO. 'position' variable could take value 0 according to the constraints of the problem. That means that you have to insert the data in the head of the list. But in your code you are inserting in position 1 when the 'position' value is 0. Your code behaves the same when 'position' is 1 and when 'position' is 0.