Codeforces Round 918 (Div. 4) |
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Finished |
Calin has $$$n$$$ buckets, the $$$i$$$-th of which contains $$$a_i$$$ wooden squares of side length $$$1$$$.
Can Calin build a square using all the given squares?
The first line contains a single integer $$$t$$$ ($$$1 \leq t \leq 10^4$$$) — the number of test cases.
The first line of each test case contains a single integer $$$n$$$ ($$$1 \leq n \leq 2 \cdot 10^5$$$) — the number of buckets.
The second line of each test case contains $$$n$$$ integers $$$a_1, \ldots, a_n$$$ ($$$1 \leq a_i \leq 10^9$$$) — the number of squares in each bucket.
The sum of $$$n$$$ over all test cases does not exceed $$$2 \cdot 10^5$$$.
For each test case, output "YES" if Calin can build a square using all of the given $$$1 \times 1$$$ squares, and "NO" otherwise.
You can output the answer in any case (for example, the strings "yEs", "yes", "Yes" and "YES" will be recognized as a positive answer).
519214 271 2 3 4 5 6 761 3 5 7 9 1142 2 2 2
YES YES NO YES NO
In the first test case, Calin can build a $$$3 \times 3$$$ square.
In the second test case, Calin can build a $$$4 \times 4$$$ square.
In the third test case, Calin cannot build a square using all the given squares.
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