title: Sum Pairwise Products 1
signature: class Solution {
  
      public Integer sumPairwiseProducts1(Integer n) {
source_py: def sum_pairwise_products_1(n):
      multiTerms = ((n * (n + 1)) // 2)
      sm = multiTerms
      for i in range(2, (n + 1)):
          multiTerms = (multiTerms - (i - 1))
          sm = (sm + (multiTerms * i))
      return sm
source_cpp: long long int sum_pairwise_products_1(int n) {
    long long int multiTerms = n * ( n + 1 ) / 2;
    long long int sum = multiTerms;
    for ( int i = 2;
    i <= n;
    i ++ ) {
      multiTerms = multiTerms - ( i - 1 );
      sum = sum + multiTerms * i;
    }
    return sum;
  }
question_info.extension: java
question_info.entry_fn_name: sumPairwiseProducts1
question_info.entry_cls_name: Solution
question_info.test_list: [{"idx": 0, "outputs": 382571, "inputs": {"n": 41}}, {"idx": 1, "outputs": 834275, "inputs": {"n": 50}}, {"idx": 2, "outputs": 2645897, "inputs": {"n": 67}}, {"idx": 3, "outputs": 15675, "inputs": {"n": 18}}, {"idx": 4, "outputs": 1711355, "inputs": {"n": 60}}, {"idx": 5, "outputs": 266, "inputs": {"n": 6}}, {"idx": 6, "outputs": 74907, "inputs": {"n": 27}}, {"idx": 7, "outputs": 601036, "inputs": {"n": 46}}, {"idx": 8, "outputs": 834275, "inputs": {"n": 50}}, {"idx": 9, "outputs": 23485, "inputs": {"n": 20}}]
question_info.test_code: import static java.util.Map.entry;  
  import java.util.*;
  import java.lang.*;
  // TESTING CODE 
  // ============================================
  class QuestionEvaluator {
      public static String validateSolution(Integer n, Integer expected){
          try{
              Driver driver = new Driver();
              if (driver.run(n,expected)){
                  return "PASSED";
              }
              return "FAILED";
              
          } catch (Exception exception_obj){
              return exception_obj.getClass().getSimpleName();
          }
  
      }
      public static void main(String[] args) {
          String result;
          result = validateSolution(41, 382571);
          System.out.println(String.format("%s%s","TEST-0...",result));    
      
          result = validateSolution(50, 834275);
          System.out.println(String.format("%s%s","TEST-1...",result));    
      
          result = validateSolution(67, 2645897);
          System.out.println(String.format("%s%s","TEST-2...",result));    
      
          result = validateSolution(18, 15675);
          System.out.println(String.format("%s%s","TEST-3...",result));    
      
          result = validateSolution(60, 1711355);
          System.out.println(String.format("%s%s","TEST-4...",result));    
      
          result = validateSolution(6, 266);
          System.out.println(String.format("%s%s","TEST-5...",result));    
      
          result = validateSolution(27, 74907);
          System.out.println(String.format("%s%s","TEST-6...",result));    
      
          result = validateSolution(46, 601036);
          System.out.println(String.format("%s%s","TEST-7...",result));    
      
          result = validateSolution(50, 834275);
          System.out.println(String.format("%s%s","TEST-8...",result));    
      
          result = validateSolution(20, 23485);
          System.out.println(String.format("%s%s","TEST-9...",result));    
      
      }
  }
  
  class Driver{
      public boolean run(Integer n, Integer expected){
  
          PLACEHOLDER_CLS_NAME sol = new PLACEHOLDER_CLS_NAME();
          return validateSolution(sol.PLACEHOLDER_FN_NAME(n),expected);
      }
      
      public boolean validateSolution(Integer actual, Integer expected){
          return actual.equals(expected);
      }
  }
  
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
question_info.test_case_ids: 0 1 2 3 4 5 6 7 8 9
question_info.commands: java __FILENAME__