14 lines
196 B
Python
14 lines
196 B
Python
N, K = map(int, input().split())
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def C(n, k):
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if n == 1:
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return 1
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elif k == 0 or k == n:
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return 1
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else:
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return C(n - 1, k) + C(n - 1, k - 1)
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print(C(N, K))
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