Submission #2163075

---

Source Code Expand

#include <stdio.h>
#include <iostream>
#include <string.h>
int main(void){
  std::string s;
  std::cin >> s;
  int cnt = 0;
  int check = 0;
  for(int i=0;i<s.length()/2;i++){
    if(s[i] == s[s.length()-i-1]){
      if(s[i] == 'x'){
        cnt+=2;
      }
      check++;
      continue;
    }
    if(s[i] == 'x'){
      cnt++;
    }else if(s[s.length()-i-1] == 'x'){
      cnt++;
    }
  }
  if(check != s.length()-1 && cnt == 0){
    printf("-1");
    return 0;
  }
  if(check == s.length()/2){
    printf("0");
    return 0;
  }
  printf("%d",cnt);
  return 0;
}

Submission Info

Judge Result