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  1. #include <bits/stdc++.h>
  2. #include <string.h>
  3. using namespace std;
  4. #define ll long long
  5.  
  6. void solve(){ 
  7. 	    int n;
  8. 	    cin>>n;char s[n];int a[n]={0};int b[n]={0};int k=0;
  9. 	   for(int i=0;i<n;i++){cin>>s[i];
  10. 	   if(s[i]=='p'){k=1;a[i]=i+1;}
  11. 	   if(s[i]=='s'){b[i]=n-i;}
  12. 	       if(k && s[i]=='s'){k=2;}}
  13. 	       if(k==2){cout<<"NO"<<endl;return;}
  14. 	       int l=0,r=n-1;
  15. 	       for(int i=n-1;i>=0;i--){
  16. 	       	int j=0;
  17. 	       		while(b[j]==0 && j<i){j++;}
  18. 	           	if(a[i]&&b[j]){if(min(a[i],b[j])>i-j+1){cout<<"NO"<<endl;return;}}
  19.  
  20.  
  21. 	               }
  22.  
  23.  
  24.  
  25. 	       cout<<"YES"<<endl;}
  26.  
  27.  
  28.  
  29.  
  30. int main() {
  31. 	int t;
  32. 	cin>>t;
  33. 	while(t--){solve(); }
  34. 	return 0;
  35. }
Success #stdin #stdout 0.01s 5280KB
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YES
https://ideone.com/bPMWrZ
language:
C++ (gcc 8.3)
created:
22 hours ago
visibility:
public

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