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  1. #include <iostream>
  2. //#include<alloc>
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.     int testcase;
  8.     cin>>testcase;
  9.     while(testcase--){
  10.         int length,flag=0,i;
  11.         cin>>length;
  12.         char *string;
  13.         string=(char *)malloc(sizeof(char)*length);
  14.         cin>>string;
  15.         for(i=0;i<length;i++){
  16.             if(string[i]=='H'||string[i]=='h')
  17.             flag=1;
  18.             if((string[i]=='T'||string[i]=='t')&&flag==0){
  19.                 cout<<"Invalid"<<endl;
  20.                 flag=2;
  21.                 break;
  22.             }
  23.             if((string[i]=='T'||string[i]=='t')&&flag==1){
  24.                 flag==0;
  25.             }
  26.  
  27.  
  28.         }
  29.         if(flag==1)
  30.         cout<<"Invalid"<<endl;
  31.         else if(flag==0)
  32.         cout<<"Valid"<<endl;
  33.         //cout<<string;
  34.     }
  35.  
  36.     return 0;
  37. }
  38.  
Success #stdin #stdout 0s 16056KB
comments (?)
stdin
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6
18
..H..T...HTH....T.
3
...
10
H..H..T..T
2
HT
11
.T...H..H.T
7
H..T..H
stdout
copy 
Invalid
Valid
Invalid
Invalid
Invalid
Invalid
https://ideone.com/yV4BUt
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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