https://www.acmicpc.net/problem/21908 21908번: Disk Sort The first line of the input contains a positive integer $n$ ($1 \le n \le 1\,000$). The next $3$ lines of the input contain $n$ positive integers $c_{i,j}$ each ($1 \le i \le 3$, $1 \le j \le n$, $1 \le c_{i,j} \le n$), the color each of the disks initiall www.acmicpc.net Ad-Hoc, Constructive, Case Work 어떤 종류의 디스크를 빈 막대에 모으기 위해서, 각 디스크마다 6번..