title: Sum Pairwise Products 2
signature: double sumPairwiseProducts2(int n) {
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(double actual, double expected){
      return abs(actual - expected) < 1e-09;
  }
  
  string driver(int n, double expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(n), 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(57, 1397887.0); 
      cout << "TEST-" << 0 << "..."
           <<  result
           << "\n";
  
      result = driver(18, 15675.0); 
      cout << "TEST-" << 1 << "..."
           <<  result
           << "\n";
  
      result = driver(97, 11449977.0); 
      cout << "TEST-" << 2 << "..."
           <<  result
           << "\n";
  
      result = driver(9, 1155.0); 
      cout << "TEST-" << 3 << "..."
           <<  result
           << "\n";
  
      result = driver(42, 420497.0); 
      cout << "TEST-" << 4 << "..."
           <<  result
           << "\n";
  
      result = driver(67, 2645897.0); 
      cout << "TEST-" << 5 << "..."
           <<  result
           << "\n";
  
      result = driver(71, 3327486.0); 
      cout << "TEST-" << 6 << "..."
           <<  result
           << "\n";
  
      result = driver(66, 2493271.0); 
      cout << "TEST-" << 7 << "..."
           <<  result
           << "\n";
  
      result = driver(69, 2972060.0); 
      cout << "TEST-" << 8 << "..."
           <<  result
           << "\n";
  
      result = driver(18, 15675.0); 
      cout << "TEST-" << 9 << "..."
           <<  result
           << "\n";
  
      return 0;
  }
source_py: def sum_pairwise_products_2(n):
      return ((((n * (n + 1)) * (n + 2)) * ((3 * n) + 1)) / 24)
source_cpp: long long int sum_pairwise_products_2(int n) {
    return n * ( n + 1 ) * ( n + 2 ) * ( 3 * n + 1 ) / 24;
  }