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for _ in range(int(input())):
	n=int(input())
	a=[int(x) for x in input().split()]
	c=0
	for i in a:
		if a.count(i)==1:
			c+=1
	print(c%(10**9+7))

Success #stdin #stdout 0.02s 27648KB

stdin

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2
5
2 1 5 3 4
10
1 2 4 2 6 7 4 10 11 12

stdout

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5
6

https://ideone.com/NfHb25

language:

Python 3 (python 3.9.5)

created:

visibility:

public

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