10 lines
174 B
Python
10 lines
174 B
Python
X = int(input())
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x = (1/2) * (-1 + (1+8*X)**0.5)
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if x%1==0 :
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n = int(x)
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else :
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n = int(x+1)
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a = X- n*(n-1)//2
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if n%2==1 :
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a = n+1-a
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print('{}/{}'.format(a,n+1-a)) |