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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.     int t;
  8.     cin>>t;
  9.     while(t--){
  10.         int n,count=0;
  11.         cin>>n;
  12.         string s;
  13.         cin>>s;
  14.         for(int i=0;i<n/2;i++){
  15.             if(s[i]!=s[n-i-1]){
  16.                 count++;
  17.             }
  18.         }
  19.         cout<<count<<endl;
  20.     }
  21.  
  22.     return 0;
  23. }
  24.  
Success #stdin #stdout 0.01s 5408KB
comments (?)
stdin
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2
5
11011
7
0111010
stdout
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0
1
https://ideone.com/g8XwpT
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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