n = int(input()) L = list(map(int, input().split())) ans = [] def func(wait, stack, out): if len(out) == n: ans.append(" ".join(map(str, out))) if len(wait) != 0: func(wait[1:], stack + [wait[0]], out) if len(stack) != 0: func(wait, stack[:-1], out + [stack[-1]]) func(L, [], []) for item i...