Newer
Older
import sys
input = sys.stdin.readline
n, m = map(int, input().split())
ans = []
arr = [*sorted(map(int, input().split()))]
def backTracking():
if len(ans) == m:
print(' '.join(map(str, ans)))
return
for i in arr:
if len(ans) > 0 and max(ans) > i:
continue
ans.append(i)
backTracking()
ans.pop()
backTracking()