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  1. #include <bits/stdc++.h>
  2. #define ll long long
  3.  
  4. using namespace std;
  5. int main()
  6. {
  7. 	ll t;
  8. 	cin>>t;
  9. 	while(t--)
  10. 	{
  11. 		ll lec;
  12. 		cin>>lec;
  13. 		string s;
  14. 		cin>>s;
  15. 		lec=s.size();
  16. 		ll att=0;
  17. 		ll req;
  18. 		for(ll i=0;i<lec;i++)
  19. 		{
  20. 			if(s[i]=='P')
  21. 			{
  22. 				att++;
  23. 			}
  24. 		}
  25. 		if((att*100)/lec<75)
  26. 		{
  27. 			ll prox=0;
  28. 			req=((75*lec)/100-att)+1;
  29. 			//cout<<req<<endl;
  30. 			for(int i=2;i<=lec-3;i++)
  31. 			{
  32. 				bool y = s[i-1]=='P'||s[i-2]=='P';
  33. 				bool z = s[i+1]=='P'||s[i+2]=='P';
  34. 				bool res=y&&z;
  35. 				if(res&&prox<req)
  36. 				{
  37. 					prox++;
  38. 				}
  39.  
  40. 			}
  41. 			if(prox>=req)
  42. 			{
  43. 				cout<<prox<<endl;
  44. 			}
  45. 			else
  46. 			{
  47. 				cout<<"-1"<<endl;
  48. 			}
  49. 		}
  50. 		else 
  51. 		{
  52. 		cout<<"0"<<endl;
  53. 		}
  54.  
  55. 	}
  56. }
  57.  
Success #stdin #stdout 0s 15240KB
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https://ideone.com/nqh9Qq
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
secret

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