I - Set Merging

You are given an integer $n$. You have $n$ sets, denoted $s_1, s_2, \ldots, s_n$. Initially, $s_i = \{i\}$, that is, the $i$-th set contains the single element $i$. Your goal is to merge all the sets into a single set. To achieve your goal, you can perform the following operation: - Select two indices $i$ and $j$ such that $i\neq j$, $s_i \neq \emptyset$, and $s_j \neq \emptyset$. That is, cho