I recently had to solve this problem for a test, but was not able to find an efficient solution for the same.

Is it possible to make 'n' insertions to a linked list efficiently when we are given the positions of all insertion, and the element which has to be inserted.

Eg: position = [0,1,2,1,2] , elements = [5,6,7,8,9], list = []

So basically the operations we would be doing are

1. add 5 at 0th index in list => list = [5]
2. add 6 at 1st index in list => list = [5, 6]
3. add 7 at 2nd index in list => list = [5, 6, 7]
4. add 8 at 1st index in list => list = [5, 8, 6, 7]
5. add 9 at 2nd index in list => list = [5, 8, 9, 6, 7]

So the final list would be [5, 8, 9, 6, 7]

Does anyone know an efficient solution for the same? (better than O(n^2))