13 lines
314 B
Python
13 lines
314 B
Python
N, M = map(int, input().split())
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trace = [([i], M, i) for i in range(N, 0, -1)] # prev, depth, now
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while trace:
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p, d, n = trace.pop()
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if d == 1:
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print(" ".join(map(str, p)))
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continue
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for i in range(N, n-1, -1):
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trace.append((p + [i], d-1, i))
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# 코드 재사용 팝트래킹
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