title: Find Maximum Product Of A Triplet In Array
signature: class Solution {
  
      public int FindMaximumProductOfATripletInArray(List<int> arr, int n) {
test_code: using System;
  using System.Numerics;
  using System.Diagnostics;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Security.Cryptography;
  using System.Web.UI;
  using System.Web.Script.Serialization;
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  namespace EvaluatePrediction {
      class TestRunner {
          public bool ValidateSolution(int actual, int expected){
              return new JavaScriptSerializer().Serialize(actual) == new JavaScriptSerializer().Serialize(expected);
          }
  
          public string driver(List<int> arr, int n, int expected){
              try{
                PLACEHOLDER_CLS_NAME solution_cls = new PLACEHOLDER_CLS_NAME();
                int pred_result = solution_cls.PLACEHOLDER_FN_NAME(arr, n); 
                if (ValidateSolution(
                      pred_result,
                      expected)){
                  return "PASSED";
                }
                return "FAILED";
              } 
              catch (Exception exception_obj)
              {
                return exception_obj.GetType().FullName;
              }
          }
          static void Main(string[] args) {
              TestRunner runner = new TestRunner();
              String result;
              result = runner.driver(
                  new List<int>{41, 66, 77}, 2, 
                  -1
              );
              Console.WriteLine(string.Format(
                  "TEST-0...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{92, -34, -36, -50, 20, -94, 2, -86, 22, -50, 74, 84, 52, -84, 98, -50, 88, 26, -36, -36, 6, -50, -48, -84, 38, -96, -62, 34, 52, 92, 40, -84, 18, -90, 54, -38, -74, -98, -8, -92, -60, 86, -36, 94, 56}, 40, 
                  921984
              );
              Console.WriteLine(string.Format(
                  "TEST-1...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 1}, 1, 
                  -1
              );
              Console.WriteLine(string.Format(
                  "TEST-2...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{2, 77, 99, 95, 78, 15, 69, 39, 34, 43, 66, 45, 97, 27, 67, 62, 64, 2, 28, 94, 41, 87, 97, 52, 14, 61, 78, 50}, 26, 
                  931491
              );
              Console.WriteLine(string.Format(
                  "TEST-3...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-62, -28, 40, 76}, 3, 
                  69440
              );
              Console.WriteLine(string.Format(
                  "TEST-4...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 1, 1, 0, 1, 1, 1, 1, 1}, 5, 
                  1
              );
              Console.WriteLine(string.Format(
                  "TEST-5...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{2, 6, 10, 11, 12, 12, 17, 18, 18, 19, 20, 22, 24, 25, 30, 35, 36, 37, 40, 41, 42, 47, 60, 60, 64, 69, 69, 70, 73, 79, 80, 83, 97, 97, 97}, 25, 
                  230400
              );
              Console.WriteLine(string.Format(
                  "TEST-6...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{-72, 98, 68, 18, 92, -84, 50, 32, -90, -40, 50, 60, -50, -50, 50, 24, 30, 94, -98, -6, 46, -46, -24, -62, -20, 62, -76}, 14, 
                  740880
              );
              Console.WriteLine(string.Format(
                  "TEST-7...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{0, 0, 0, 0, 0, 1, 1, 1}, 7, 
                  0
              );
              Console.WriteLine(string.Format(
                  "TEST-8...{0}",
                  result)
              );result = runner.driver(
                  new List<int>{85, 36, 7, 69, 9, 45, 18, 47, 1, 78, 72, 53, 37, 20, 95, 71, 58, 41}, 14, 
                  477360
              );
              Console.WriteLine(string.Format(
                  "TEST-9...{0}",
                  result)
              );
          }
      }
  }
  
source_py: def find_maximum_product_of_a_triplet_in_array(arr, n):
      if (n < 3):
          return (- 1)
      max_product = (- (sys.maxsize - 1))
      for i in range(0, (n - 2)):
          for j in range((i + 1), (n - 1)):
              for k in range((j + 1), n):
                  max_product = max(max_product, ((arr[i] * arr[j]) * arr[k]))
      return max_product
source_cpp: int find_maximum_product_of_a_triplet_in_array(vector<int> arr, int n) {
    if ( n < 3 ) return - 1;
    int max_product = INT_MIN;
    for ( int i = 0;
    i < n - 2;
    i ++ ) for ( int j = i + 1;
    j < n - 1;
    j ++ ) for ( int k = j + 1;
    k < n;
    k ++ ) max_product = max ( max_product, arr [ i ] * arr [ j ] * arr [ k ] );
    return max_product;
  }