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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int main() {
  4. 	int t;
  5. 	scanf("%d\n",&t);
  6. 	while(t--){
  7. 		long int n,i,r=0;
  8. 		cin>>n;
  9. 		long long int a[n];
  10. 		for(i=0;i<n;i++){
  11. 			cin>>a[i];
  12. 		}
  13. 		sort(a,a+n);
  14. 		for(i=0;i<n-1;i++)
  15. 	{
  16. 		if(a[i+1]%a[i]==0)
  17. 		{
  18. 			r=1;
  19. 			break;
  20. 		}
  21. 	}
  22. 		if(r==1)
  23. 		cout<<-1<<endl;
  24. 		else
  25. 		cout<<n<<endl;
  26. 	}
  27.  
  28. 	return 0;
  29. }
Success #stdin #stdout 0s 4408KB
comments (?)
stdin
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2
2
7 2
5
2 5 9 4 67
stdout
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2
-1
https://ideone.com/lcaaRn
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
secret

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