18 lines
272 B
Python
18 lines
272 B
Python
n,m=map(int,input().split())
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arr=[]
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ch=[0]*(n+1)
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def bt(s):
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if len(arr)==m:
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print(*arr)
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return
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for i in range(s,n+1):
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if ch[i]==1:
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continue
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arr.append(i)
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ch[i]=1
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bt(i)
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ch[arr.pop()]=0
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bt(1) |