23 lines
352 B
Python
23 lines
352 B
Python
import math
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n = int(input())
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radii = list(map(int, input().split()))
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prev_r = None
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prev_n = 1
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prev_d = 1
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for r in radii:
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if prev_r is None:
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prev_r = r
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continue
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n = prev_r * prev_n
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d = r * prev_d
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gcd = math.gcd(n, d)
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n = n // gcd
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d = d // gcd
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print(f"{n}/{d}")
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prev_n = n
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prev_d = d
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prev_r = r
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