title: Sum K Th Group Odd Positive Numbers
signature: function sum_k_th_group_odd_positive_numbers(k)
test_code: using Printf
  
  # SOLUTION CODE
  # ============================================
  PLACEHOLDER_CODE_BODY
  
  # TESTING CODE 
  # ============================================
  function validate_solution(actual, expected)
      return actual == expected
  end
  
  function driver(k, expected)
      try
  
          if validate_solution(PLACEHOLDER_FN_NAME(k), expected)
              return "PASSED";
          end
          return "FAILED";
      catch exception_obj
          return string(Base.typename(typeof(exception_obj)).wrapper);
      end
  end
  
  function main()
      
      result = driver(91, 753571);
      @printf("TEST-0...%s\n",result);
      
      result = driver(52, 140608);
      @printf("TEST-1...%s\n",result);
      
      result = driver(78, 474552);
      @printf("TEST-2...%s\n",result);
      
      result = driver(51, 132651);
      @printf("TEST-3...%s\n",result);
      
      result = driver(65, 274625);
      @printf("TEST-4...%s\n",result);
      
      result = driver(39, 59319);
      @printf("TEST-5...%s\n",result);
      
      result = driver(42, 74088);
      @printf("TEST-6...%s\n",result);
      
      result = driver(12, 1728);
      @printf("TEST-7...%s\n",result);
      
      result = driver(56, 175616);
      @printf("TEST-8...%s\n",result);
      
      result = driver(98, 941192);
      @printf("TEST-9...%s\n",result);
      
  end
  
  main()
source_py: def sum_k_th_group_odd_positive_numbers(k):
      cur = int(((k * (k - 1)) + 1))
      sum = 0
      while k:
          sum += cur
          cur += 2
          k = (k - 1)
      return sum
source_cpp: int sum_k_th_group_odd_positive_numbers(int k) {
    int cur = ( k * ( k - 1 ) ) + 1;
    int sum = 0;
    while ( k -- ) {
      sum += cur;
      cur += 2;
    }
    return sum;
  }