Escape One

Chef has a sequence $A_1, A_2, \ldots, A_N$. The sequence is circular, i.e. for each valid $i$, elements $A_i$ and $A_{i+1}$ are considered adjacent, and elements $A_1$ and $A_N$ are also considered adjacent. Initially, each element of this sequence is either $1$ or $0$. You may perform some operations on this sequence. In one operation, you should choose an index $i$ such that $A_i = 1$ and mo