AtCoder Beginner Contest 152
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Problem Statement

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Given are $N$ positive integers $A_1,...,A_N$.

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Consider positive integers $B_1, ..., B_N$ that satisfy the following condition.

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Condition: For any $i, j$ such that $1 \leq i < j \leq N$, $A_i B_i = A_j B_j$ holds.

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Find the minimum possible value of $B_1 + ... + B_N$ for such $B_1,...,B_N$.

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Since the answer can be enormous, print the sum modulo ($10^9 +7$).

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Constraints

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  • $1 \leq N \leq 10^4$
  • $1 \leq A_i \leq 10^6$
  • All values in input are integers.
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Input

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Input is given from Standard Input in the following format:

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N
A_1 ... A_N

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Output

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Print the minimum possible value of $B_1 + ... + B_N$ for $B_1,...,B_N$ that satisfy the condition, modulo ($10^9 +7$).

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样例

Input #1
3
2 3 4
Output #1
13
Let $B_1=6$, $B_2=4$, and $B_3=3$, and the condition will be satisfied.
Input #2
5
12 12 12 12 12
Output #2
5
We can let all $B_i$ be $1$.
Input #3
3
1000000 999999 999998
Output #3
996989508
Print the sum modulo $(10^9+7)$.
题目信息
题号
abc152_e
时间限制
2 s
内存限制
1024 MB

题面与样例版权归 AtCoder 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。