Div 3 B. Two grams [Wrong answer on test 3]

    // B. Two grams https://codeforces.com/contest/977/problem/B
    #include <iostream>
    #include <string>
    using namespace std;
    int lengthOfString = 4;
    string inputString = "ZZZAA";
    string stringArray[10] = {};
    int stringArrayIndex = 0;
    int stringArrayIndexCounter[10] = {};
    string tempString ="";

    int stringArrayIndexCounterMaxNumber = 0;
    int maxIndex = 0;
    int twoGramsAvailAbility = 0;


    int checkTwoGramsAvailAbility()
    {
        twoGramsAvailAbility=0;
        for(int i =0; i<stringArrayIndex; i++)
        {
            if(stringArray[i]==tempString)
            {
             //   cout << "ima duplicate";
              //  cout <<" String array i temp string: " << stringArray[i] << " " << tempString<< endl;
                twoGramsAvailAbility=1;
                stringArrayIndexCounter[i]+=1;;
                break;
            }
        }
        return twoGramsAvailAbility;
    }

    void maxContainedValue()
    {
       for(int i =0; i<sizeof(stringArrayIndexCounter)/sizeof(stringArrayIndexCounter[0]);i++)
       {
        if(stringArrayIndexCounterMaxNumber < stringArrayIndexCounter[i])
        {
            stringArrayIndexCounterMaxNumber = stringArrayIndexCounter[i];
            maxIndex = i;

        }
       }
      //  cout <<"The max index number is: " << stringArrayIndexCounterMaxNumber << endl;
       /*
       cout << "start" << endl;
       for(int i =0; i<sizeof(stringArrayIndexCounter)/sizeof(stringArrayIndexCounter[0]);i++)
       {
                  cout << stringArrayIndexCounter[i] << endl;
       }
       */
    }

    int main()
    {

    lengthOfString = inputString.length();
    //cout << "L: "<< lengthOfString << endl;
     int number;
     cin >> number;
     cin >> inputString;

     for(int i =0; i<(lengthOfString-1); i++)
     {
       //  cout << "I:" << i << endl;
         int I = i;
         if(I>=(lengthOfString-1))
         {
             I = (lengthOfString-1);
         }
         int currentChar = int(inputString.at(I));
         int nextChar = int(inputString.at(++I));
      //    cout <<"Current char: " << currentChar << " next char: " << nextChar << " i" <<i << endl;
         if((currentChar==nextChar) || (currentChar==(nextChar+1)) || ((1+currentChar)==nextChar))
         {
     //        cout << "tuka smE" << endl;
             tempString += inputString.at(i);
             tempString += inputString.at(i+1);
              //cout << "TEMPSTRING: " << tempString << endl;

             int temp = checkTwoGramsAvailAbility();
             // Ako temp = 1 se povtarqt
             if(!temp) // Ako temp = 0 se pravi nov string
             {
               //   cout << "tuka sme22" << endl;
                  stringArray[stringArrayIndex] = tempString;
                  stringArrayIndex++;
                  stringArrayIndexCounter[i]+=1;;
             }

         }

              tempString ="";

     }


     maxContainedValue();
     //cout << stringArray[stringArrayIndexCounterMaxNumber] << endl;
        for(int i =0; i<sizeof(stringArrayIndexCounter)/sizeof(stringArrayIndexCounter[0]);i++)
        {
         //         cout << stringArrayIndexCounter[i] << endl;
        }



     cout << stringArray[maxIndex] << endl;
    }