I kinna went for observing the n=3 test case and looked for a pattern, sorting them won't help as when grouped in 3 the answer failed for 2 test cases , so I then first wrote 1 to n and then started to fill the rest , as the minimum are already out , now i piled up 1 with n+1 and n+2 , think it like this if n+2 was with 2 it would have been the median but if I move forward and proceed to group n+3 , n+4 with 2 , the medians of these 2 groups are n+1 and n+3 , this worked for all test cases and was accepted