백준 15654 파이썬 python : N과 M (5) @@황소처럼 우직하게@@

n, m = map(int, input().split())

num_list = list(map(int, input().split()))
num_list.sort()
a = [0 for i in range(m)]
c = [False for i in range(n)]

def go(selected, n, m):
    if selected == m:
        print(' '.join(map(str, a)))
        return
    for i in range(n):
        if c[i] == False:
            c[i] = True
            a[selected] = num_list[i]
            go(selected + 1, n, m)
            c[i] = False

    # a[selected] = num_list[idx]
    # go(idx + 1, selected + 1, n, m)
    # a[selected] = 0
    # go(idx + 1, selected, n, m)

go(0, n, m)