Codeforces Round 853 (Div. 2) |
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Finished |
Mocha likes arrays, and Serval gave her an array consisting of positive integers as a gift.
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.
For example:
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.
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.
The first line of each test case contains a single integer $$$n$$$ ($$$2\leq n\leq 100$$$) — the length of array $$$a$$$.
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 $$$a$$$.
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.
You can output Yes and No in any case (for example, strings yEs, yes, Yes and YES will be recognized as a positive response).
623 631 2 433 6 1315 35 21435 10 35 1451261 227821 143 4171 1941
No Yes Yes No Yes Yes
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 $$$a$$$.
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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