CSES 1668 Building Teams - Output Format

If bipartition is possible, print $n$ space-separated integers: the team number ($1$ or $2$) for each pupil from $1$ to $n$. If impossible, print the single word IMPOSSIBLE. The color array becomes your answer directly. After running bipartite detection successfully, print color[1]+1, color[2]+1, through color[n]+1. Adding $1$ converts your internal colors $0$ and $1$ to team numbers $1$ and $2$ as required by the output format.