title: Sum K Th Group Odd Positive Numbers
signature: int sumKThGroupOddPositiveNumbers(int k) {
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(int k, int expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(k), 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(91, 753571); 
      cout << "TEST-" << 0 << "..."
           <<  result
           << "\n";
  
      result = driver(52, 140608); 
      cout << "TEST-" << 1 << "..."
           <<  result
           << "\n";
  
      result = driver(78, 474552); 
      cout << "TEST-" << 2 << "..."
           <<  result
           << "\n";
  
      result = driver(51, 132651); 
      cout << "TEST-" << 3 << "..."
           <<  result
           << "\n";
  
      result = driver(65, 274625); 
      cout << "TEST-" << 4 << "..."
           <<  result
           << "\n";
  
      result = driver(39, 59319); 
      cout << "TEST-" << 5 << "..."
           <<  result
           << "\n";
  
      result = driver(42, 74088); 
      cout << "TEST-" << 6 << "..."
           <<  result
           << "\n";
  
      result = driver(12, 1728); 
      cout << "TEST-" << 7 << "..."
           <<  result
           << "\n";
  
      result = driver(56, 175616); 
      cout << "TEST-" << 8 << "..."
           <<  result
           << "\n";
  
      result = driver(98, 941192); 
      cout << "TEST-" << 9 << "..."
           <<  result
           << "\n";
  
      return 0;
  }
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;
  }