2024-04-17 09:42:01 +01:00
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from typing import DefaultDict
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n = int(input())
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a = [int(x) for x in input().strip().split(' ')]
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d = sorted(list(set(a)), reverse=True)
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a.sort()
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slot = DefaultDict(lambda: [])
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slot_cnt = DefaultDict(lambda: 0)
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for i in range(n):
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for j in range(i + 1, n):
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for k in d:
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if a[i] % k == 0 and a[j] % k == 0:
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slot[k].append((a[i], a[j]))
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slot_cnt[k] += 1
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break
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print(slot)
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print(n * (n - 1) // 2 - sum(v for v in slot_cnt.values()))
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