title: Maximum Number Characters Two Character String
signature: int maximumNumberCharactersTwoCharacterString(string str) {
test_code: #include <algorithm>
  #include <assert.h>
  #include <cstdlib>
  #include <iostream>
  #include <map>
  #include <set>
  #include <string>
  #include <tuple> 
  #include <unordered_map>
  #include <vector>
  #include <math.h>
  #include <cmath>
  #include <bits/stdc++.h>
  #include <numeric>
  #include <functional>
  
  using namespace std;
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  bool validateSolution(int actual, int expected){
      return actual == expected;
  }
  
  string driver(string str, int expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(str), expected)){
              return "PASSED";
          }
          return "FAILED";
      }
      catch (const std::overflow_error& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (const std::runtime_error& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (const std::exception& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (...)
      {
          return "UNK_ERROR";
      }
  }
  
  int main() {
      string result = "";
  
      result = driver("cI", -1); 
      cout << "TEST-" << 0 << "..."
           <<  result
           << "\n";
  
      result = driver("76478", 2); 
      cout << "TEST-" << 1 << "..."
           <<  result
           << "\n";
  
      result = driver("1", -1); 
      cout << "TEST-" << 2 << "..."
           <<  result
           << "\n";
  
      result = driver("tr", -1); 
      cout << "TEST-" << 3 << "..."
           <<  result
           << "\n";
  
      result = driver("10", -1); 
      cout << "TEST-" << 4 << "..."
           <<  result
           << "\n";
  
      result = driver("01", -1); 
      cout << "TEST-" << 5 << "..."
           <<  result
           << "\n";
  
      result = driver("Rmhzp", -1); 
      cout << "TEST-" << 6 << "..."
           <<  result
           << "\n";
  
      result = driver("5784080133917", 10); 
      cout << "TEST-" << 7 << "..."
           <<  result
           << "\n";
  
      result = driver("1100", 0); 
      cout << "TEST-" << 8 << "..."
           <<  result
           << "\n";
  
      result = driver("OK", -1); 
      cout << "TEST-" << 9 << "..."
           <<  result
           << "\n";
  
      return 0;
  }
source_py: def maximum_number_characters_two_character_string(str):
      n = len(str)
      res = (- 1)
      for i in range(0, (n - 1)):
          for j in range((i + 1), n):
              if (str[i] == str[j]):
                  res = max(res, abs(((j - i) - 1)))
      return res
source_cpp: int maximum_number_characters_two_character_string(string & str) {
    int n = str . length ( );
    int res = - 1;
    for ( int i = 0;
    i < n - 1;
    i ++ ) for ( int j = i + 1;
    j < n;
    j ++ ) if ( str [ i ] == str [ j ] ) res = max ( res, abs ( j - i - 1 ) );
    return res;
  }