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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6. 	int t,x,n,k,a, arr[1001]={0,};
  7.  
  8. 	cin>>t>>x>>n;
  9.  
  10. 	for(int i=0;i<n;i++){
  11. 		cin>>k;
  12.  
  13. 		for(int j=0;j<k;j++){
  14. 			cin>>a;
  15. 			arr[a]++;
  16. 		}
  17. 	}
  18.  
  19. 	if(arr[x]==n)
  20. 		cout<<"YES";
  21. 	else
  22. 		cout<<"NO";
  23.  
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 5316KB
comments (?)
stdin
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7 3
4
1
4
6
1 2 4 5 6 7
3
1 3 4
2
4 7
stdout
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NO
https://ideone.com/AgxlFU
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

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