[BOJ/Python] 5568번 카드 놓기

https://www.acmicpc.net/problem/5568

5568번: 카드 놓기

from itertools import permutations


n = int(input())
k = int(input())

lst = []

result = set()



for i in range(n):

    a = input()

    lst.append(a)


for per in permutations(lst,k):

    result.add("".join(per))


print(len(result))