Codeforces Round 853 (Div. 2)
A
Serval and Mocha's Array
Codeforces
800
原题
←B →
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Mocha likes arrays, and Serval gave her an array consisting of positive integers as a gift.

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Mocha thinks that for an array of positive integers $a$, it is good iff the greatest common divisor of all the elements in $a$ is no more than its length. And for an array of at least $2$ positive integers, it is beautiful iff all of its prefixes whose length is no less than $2$ are good.

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For example:

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  • $[3,6]$ is not good, because $\gcd(3,6)=3$ is greater than its length $2$.
  • $[1,2,4]$ is both good and beautiful, because all of its prefixes whose length is no less than $2$, which are $[1,2]$ and $[1,2,4]$, are both good.
  • $[3,6,1]$ is good but not beautiful, because $[3,6]$ is not good.
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Now Mocha gives you the gift array $a$ of $n$ positive integers, and she wants to know whether array $a$ could become beautiful by reordering the elements in $a$. It is allowed to keep the array $a$ unchanged.

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Input

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Each test contains multiple test cases. The first line contains the number of test cases $t$ ($1\leq t\leq 500$). The description of the test cases follows.

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The first line of each test case contains a single integer $n$ ($2\leq n\leq 100$) — the length of array $a$.

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The second line of each test case contains $n$ integers $a_1,a_2,\ldots,a_n$ ($1\leq a_1,a_2,\ldots,a_n\leq 10^6$) — the elements of array $a$.

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Output

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For each test case, print Yes if it is possible to reorder the elements in $a$ to make it beautiful, and print No if not.

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You can output Yes and No in any case (for example, strings yEs, yes, Yes and YES will be recognized as a positive response).

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Note

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In the first test case, neither $[3,6]$ nor $[6,3]$ are beautiful, so it's impossible to obtain a beautiful array by reordering the elements in $a$.

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In the second test case, $[1,2,4]$ is already beautiful. Keeping the array $a$ unchanged can obtain a beautiful array.

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样例

Input #1
6
2
3 6
3
1 2 4
3
3 6 1
3
15 35 21
4
35 10 35 14
5
1261 227821 143 4171 1941
Output #1
No
Yes
Yes
No
Yes
Yes
InputCopy OutputCopy
题目信息
题号
1789A
时间限制
1 s
内存限制
256 MB
标签
暴力
数学
数论

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