https://codeforces.com/contest/1068/problem/E (link to the problem)

test case 4: 16 2 1 12 2 12 3 12 4 13 5 13 6 13 7 14 8 14 9 15 10 15 11 15 12 16 13 16 14 16 15 16

I am not able to understand why it is not a 2 — multihedgehog. Can someone please explain the question? Thankyou