5분 컷
출력:
[[1,2,3,4],[1,2,4,3],[1,3,2,4],[1,4,2,3],[1,3,4,2],[1,4,3,2],[2,1,3,4],[2,1,4,3],[3,1,2,4],[4,1,2,3],[3,1,4,2],[4,1,3,2],[2,3,1,4],[2,4,1,3],[3,2,1,4],[4,2,1,3],[3,4,1,2],[4,3,1,2],[2,3,4,1],[2,4,3,1],[3,2,4,1],[4,2,3,1],[3,4,2,1],[4,3,2,1]]
cont 코드를 5분만에 짤 정도로 뇌가 고인물이 된 건 잘 알았음
cont 없는 cont 코드라서 딱히 어렵지는 않음;;
그게 고인물임