title: Sum Matrix Element Absolute Difference Row Column Numbers 1
signature: function sum_matrix_element_absolute_difference_row_column_numbers_1(n)
source_py: def sum_matrix_element_absolute_difference_row_column_numbers_1(n):
      sum = 0
      for i in range(n):
          sum += (i * (n - i))
      return (2 * sum)
source_cpp: int sum_matrix_element_absolute_difference_row_column_numbers_1(int n) {
    int sum = 0;
    for ( int i = 0;
    i < n;
    i ++ ) sum += i * ( n - i );
    return 2 * sum;
  }
question_info.entry_fn_name: sum_matrix_element_absolute_difference_row_column_numbers_1
question_info.entry_cls_name: Solution
question_info.test_case_ids: ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
question_info.test_code: 
  
  -- SOLUTION CODE
  -- ============================================
  PLACEHOLDER_CODE_BODY
  
  -- TESTING CODE 
  -- ============================================
  function isCorrect(actual, expected)
      if type(expected) ~= type(actual) then
          return false
      end
      
      if type(expected) == 'table' then
          for k,v_expected in pairs(expected) do
              
              if actual[k] == nil then
                  return false
              end
              local v_actual = actual[k]
              if not isCorrect(v_actual, v_expected) then
                  return false
              end
              actual[k]=nil
          end
      
          if next(actual) then 
              return false
          end
          return true
      else
          return actual == expected
      end
  end
  
  function validateSolution(actual, expected)
      return isCorrect(actual,expected)
  end
  
  function driver(n, expected)
      local exec_result;
      local status, error_msg = pcall(function () 
          exec_result=PLACEHOLDER_FN_NAME(n) 
      end)
      if status then
          if validateSolution(exec_result,expected) then
              return "PASSED"
          end
          return "FAILED"
      else
          return string.format("ERROR=%s",string.gsub(error_msg,".*:[%d]+: ",""))
      end
  end
      
  function main()
      result = driver(63, 83328)
      print(string.format("TEST-0...%s",result))
  
      result = driver(72, 124392)
      print(string.format("TEST-1...%s",result))
  
      result = driver(28, 7308)
      print(string.format("TEST-2...%s",result))
  
      result = driver(35, 14280)
      print(string.format("TEST-3...%s",result))
  
      result = driver(6, 70)
      print(string.format("TEST-4...%s",result))
  
      result = driver(70, 114310)
      print(string.format("TEST-5...%s",result))
  
      result = driver(20, 2660)
      print(string.format("TEST-6...%s",result))
  
      result = driver(8, 168)
      print(string.format("TEST-7...%s",result))
  
      result = driver(8, 168)
      print(string.format("TEST-8...%s",result))
  
      result = driver(35, 14280)
      print(string.format("TEST-9...%s",result))
  
  end
  
  main()
question_info.test_list: [{"idx": 0, "outputs": 83328, "inputs": {"n": 63}}, {"idx": 1, "outputs": 124392, "inputs": {"n": 72}}, {"idx": 2, "outputs": 7308, "inputs": {"n": 28}}, {"idx": 3, "outputs": 14280, "inputs": {"n": 35}}, {"idx": 4, "outputs": 70, "inputs": {"n": 6}}, {"idx": 5, "outputs": 114310, "inputs": {"n": 70}}, {"idx": 6, "outputs": 2660, "inputs": {"n": 20}}, {"idx": 7, "outputs": 168, "inputs": {"n": 8}}, {"idx": 8, "outputs": 168, "inputs": {"n": 8}}, {"idx": 9, "outputs": 14280, "inputs": {"n": 35}}]