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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	// your code goes here
  6. 	int t;cin>>t;
  7. 	while(t--){
  8. 		int n;cin>>n;
  9. 		string last;
  10. 		bool cool = true;
  11. 		while(n--){
  12. 			string s;cin>>s;
  13. 			if(s==last && last!="milk"){
  14. 				cool = false;
  15. 			}
  16. 			last = s;
  17. 		}
  18. 		if(cool && last != "cookie"){
  19. 			cout<<"YES"<<endl;
  20. 		}
  21. 		else{
  22. 			cout<<"NO"<<endl;
  23. 		}
  24. 	}
  25. 	return 0;
  26. }
Success #stdin #stdout 0s 16056KB
comments (?)
stdin
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4
7
cookie milk milk cookie milk cookie milk
5
cookie cookie milk milk milk
4
milk milk milk milk
1
cookie
stdout
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YES
NO
YES
NO
https://ideone.com/Zjk3Te
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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