A. Omkar and Bad Storytime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputOmkar has received a message from Anton saying "Your story for problem A is confusing. Just make a formal statement." Because of this, Omkar gives you an array a = [a_1, a_2, \ldots, a_n] of n distinct integers. An array b = [b_1, b_2, \ldots, b_k] is called nice if for any two distinct elements b_i, b_j of b, |b_i-b_j| appears in b at least once. In addition, all elements in b must be distinct. Can you add several (maybe, 0) integers to a to create a nice array b of size at most 300? If a is already nice, you don't have to add any elements.For example, array [3, 6, 9] is nice, as |6-3|=|9-6| = 3, which appears in the array, and |9-3| = 6, which appears in the array, while array [4, 2, 0, 6, 9] is not nice, as |9-4| = 5 is not present in the array.For integers x and y, |x-y| = x-y if x > y and |x-y| = y-x otherwise.InputEach test contains multiple test cases. The first line contains t (1 \leq t \leq 50), the number of test cases. 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 the array a.The second line of each test case contains n distinct integers a_1, a_2, \cdots, a_n (-100 \leq a_i \leq 100) — the elements of the array a.OutputFor each test case, output one line containing YES if Omkar can create a nice array b by adding elements to a and NO otherwise. The case of each letter does not matter, so yEs and nO will also be accepted.If the first line is YES, output a second line containing a single integer k (n \leq k \leq 300). Then output one line containing k distinct integers b_1, b_2, \cdots, b_k (-10^9 \leq b_i \leq 10^9), the elements of the nice array b. b_1, b_2, \cdots, b_k can be in any order. For each a_i in a, a_i must appear at least once in b.It can be proved that if Omkar can create such an array b, then he can also do so in a way that satisfies the above constraints.If multiple solutions exist, you can print any. ExampleInput
4
3
3 0 9
2
3 4
5
-7 3 13 -2 8
4
4 8 12 6
Output
yes
4
6 0 3 9
yEs
5
5 3 1 2 4
NO
Yes
6
8 12 6 2 4 10
NoteFor the first case, you can add integers to a to receive the array b = [6, 0, 3, 9]. Note that |6-3| = |9-6| = |3-0| = 3 and 3 is in b, |6-0| = |9-3| = 6 and 6 is in b, and |9-0| = 9 is in b, so b is nice.For the second case, you can add integers to a to receive the array b = [5, 3, 1, 2, 4]. We have that |2-1| = |3-2| = |4-3| = |5-4| = 1 is in b, |3-1| = |4-2| = |5-3| = 2 is in b, |4-1| = |5-2| = 3 is in b, and |5-1| = 4 is in b, so b is nice.For the fourth case, you can add integers to a to receive the array b = [8, 12, 6, 2, 4, 10]. We have that |4-2| = |6-4| = |8-6| = |10-8| = |12-10| = 2 is in b, |6-2| = |8-4| = |10-6| = |12-8| = 4 is in b, |8-2| = |10-4| = |12-6| = 6 is in b, |10-2| = |12-4| = 8 is in b, and |12-2| = 10 is in b, so b is nice.It can be proven that for all other test cases it is impossible to create a nice array b.
4
3
3 0 9
2
3 4
5
-7 3 13 -2 8
4
4 8 12 6

yes 4 6 0 3 9 yEs 5 5 3 1 2 4 NO Yes 6 8 12 6 2 4 10 
['brute force', 'constructive algorithms', '*800']