Hiitdromes

#include <iostream>
#include <string>



int main(){
  int n;
  std::string s;
  std::cin >> n >> s;

  int i = 0;
  int j = n-1;
  int numOps = 0;
  while (i<j) {
    
    if (s[i] == 'H' || s[i] == 'I' || s[i] == 'T') {
      if (s[j] != s[i]){
        numOps++; //replace
      }
    } else if (s[j] == 'H' || s[j] == 'I' || s[j] == 'T') {
      if (s[j] != s[i]){
        numOps++; //replace
      }
    }else {
      numOps+=2; //remove both
    }

    ++i;
    --j;
  }

  std::cout << numOps << "\n";
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: ACCEPTED

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: WRONG ANSWER

Test 11

Verdict: WRONG ANSWER

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: WRONG ANSWER

Test 15

Verdict: WRONG ANSWER

Test 16

Verdict: ACCEPTED

Test 17

Verdict: WRONG ANSWER

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED

Test 20

Verdict: ACCEPTED

Test 21

Verdict: ACCEPTED