21 lines
353 B
Python
21 lines
353 B
Python
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def is_zhi(n):
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if n==1:
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return 0
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if n==2:
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return 1
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is_zhi=1
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for i in range(2,n):
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if n%i==0:
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is_zhi=0
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return is_zhi
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def gede(n1,n2):
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if is_zhi(n1) and is_zhi(n2):
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print(n1, n2)
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return n1
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gede(n1-1,n2+1)
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#print(n1,n2,is_zhi(n1) , is_zhi(n2))
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n=int(input())
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gede(n-1,1)
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