백준(BaekJoon)_15649_N과M(1)

result = []
def func(n,m):
    if len(result) == m:
        for i in result:
            print(i, end=" ")
        print()
        return 
    else:
        for i in range(1,n+1):
            if i not in result:
                result.append(i)
                func(n,m)
                result.pop()

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


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cf. 같은 결과를 낸다

if len(result) == m:
    for i in result:
        print(i, end=" ")
    print()
    
    
if len(result)==m:
    print(' '.join(map(str,result)))
    return
    
 # 출처: https://jiwon-coding.tistory.com/