title: Sum Pairwise Products 1
signature: function sumPairwiseProducts1(n: number): number {
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.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.entry_cls_name: Solution
question_info.test_code: 
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  function convertToString(value: any): string{
      return JSON.stringify(value, function (key, val) {
          if (val instanceof Set) {
              return Array.from(val);
          } return val;});
  }
  
  function validateSolution(actual: number, expected: number): boolean {
      return convertToString(actual) === convertToString(expected);
  }
  
  function driver(n: number, expected:number): string {
      try{
          if (validateSolution(PLACEHOLDER_FN_NAME(n),expected)){
              return "PASSED";
          }
          return "FAILED";
      } catch (error) {
        return error.name;
      }
      
  }
      
  function main(){
    let result = '';
    result = driver(41, 382571);
    console.log(`TEST-0...${result}`);
  
    result = driver(50, 834275);
    console.log(`TEST-1...${result}`);
  
    result = driver(67, 2645897);
    console.log(`TEST-2...${result}`);
  
    result = driver(18, 15675);
    console.log(`TEST-3...${result}`);
  
    result = driver(60, 1711355);
    console.log(`TEST-4...${result}`);
  
    result = driver(6, 266);
    console.log(`TEST-5...${result}`);
  
    result = driver(27, 74907);
    console.log(`TEST-6...${result}`);
  
    result = driver(46, 601036);
    console.log(`TEST-7...${result}`);
  
    result = driver(50, 834275);
    console.log(`TEST-8...${result}`);
  
    result = driver(20, 23485);
    console.log(`TEST-9...${result}`);
  
  };
  
  main();
question_info.extension: ts
question_info.entry_fn_name: sumPairwiseProducts1
question_info.test_case_ids: 0 1 2 3 4 5 6 7 8 9
question_info.commands: tsc --target es2020 --lib es5,dom,es2015,es2020 __FILENAME__
question_info.commands: node __FILENAME__.js