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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4.  
  5. void sorting(vector<int>& a){
  6. 	sort(a.begin(),a.end());
  7. }
  8. int main() {
  9. 	ios_base::sync_with_stdio(0);
  10. 	cin.tie(0);
  11. 	ll t;
  12. 	cin>>t;
  13.  
  14. 	for(int i=0;i<t;i++){
  15. 		ll n;
  16. 		cin>>n;
  17. 		vector<int> a(n);
  18. 		for(int i=0;i<n;i++){
  19. 		cin>>a[i];
  20. 	   }
  21. 	   sorting(a);
  22. 	   for(int k=0;k<n;k++){
  23. 		if(a[k]==a[k+1]){
  24. 			cout<<a[k]<<" ";
  25. 		}
  26. 	   }
  27. 	   cout<<"\n";
  28. 	}
  29.  
  30.  
  31. 	return 0;
  32. }
  33.  
Success #stdin #stdout 0.01s 5536KB
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stdin
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2
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1 3 2 3 4 6 5 5 
10
1 5 2 8 1 4 7 4 3 6
stdout
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3 5 
1 4
https://ideone.com/JKQZKO
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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