01 Subsequence

You are handed a binary string $S$, but not in any ordinary form. Instead of being directly given the value of $S$, you are given an array $C$ of size $N$ representing the *01-compression representation* of $S$. This means $S$ first contains $C_1$ $\texttt{0}$ characters, then $C_2$ $\texttt{1}$ characters, then $C_3$ $\texttt{0}$ characters, and so on. For example, the array $C = [2, 3, 4, 3]$ co