title: Maximum Area Rectangle Picking Four Sides Array
signature: func maximumAreaRectanglePickingFourSidesArray(arr []int, n int) int {
test_code: package main
  
  import (
      "fmt"
      "reflect"
      "math"
      "sort"
  )
  
  // SOLUTION CODE
  // ===================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE
  // ===================================
  func validateSolution(actual int, expected int) bool {
      return reflect.DeepEqual(actual,expected)
  }
  
  func driver(arr []int, n int, expected int) string {
      if validateSolution(PLACEHOLDER_FN_NAME(arr, n),expected) {
              return "PASSED"
      }
      return "FAILED"
  
  }
  
  func main() {
  
      // Use imports to avoid undefined errors
      var _ = reflect.DeepEqual
      _ = math.Abs
      _ = sort.Sort
      result := ""
      result = driver([]int{99, 96, 95, 95, 92, 84, 83, 82, 81, 74, 72, 68, 67, 52, 51, 51, 49, 47, 44, 40, 36, 25, 24, 17, 16, 14, 12, 11, 9, 8, 6, 5, 1}, 
  	27, 4845)
      fmt.Printf("TEST-0...%s\n", result)
      
      result = driver([]int{-32, -54, -82, -92}, 
  	2, 0)
      fmt.Printf("TEST-1...%s\n", result)
      
      result = driver([]int{1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 
  	15, 1)
      fmt.Printf("TEST-2...%s\n", result)
      
      result = driver([]int{99, 96, 96, 94, 68, 65, 62, 60, 45, 44, 30, 26, 17, 17, 16, 15, 2}, 
  	8, 0)
      fmt.Printf("TEST-3...%s\n", result)
      
      result = driver([]int{98, 94, 82, 82, 74, 66, 66, 56, 54, 46, 16, -28, -34, -42, -50, -52, -78, -82, -88}, 
  	15, 5412)
      fmt.Printf("TEST-4...%s\n", result)
      
      result = driver([]int{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 
  	18, 1)
      fmt.Printf("TEST-5...%s\n", result)
      
      result = driver([]int{97, 96, 93, 87, 85, 85, 75, 68, 65, 65, 64, 63, 62, 58, 56, 52, 49, 44, 43, 38, 33, 30, 29, 28, 27, 25, 24, 23, 14, 14, 13, 10, 8, 8, 8, 6, 1}, 
  	20, 5525)
      fmt.Printf("TEST-6...%s\n", result)
      
      result = driver([]int{78, 78, 76, 70, 60, 54, 50, 32, 16, 16, 6, -6, -20, -56, -64, -68, -70, -90, -90, -92}, 
  	19, 1248)
      fmt.Printf("TEST-7...%s\n", result)
      
      result = driver([]int{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, 
  	30, 1)
      fmt.Printf("TEST-8...%s\n", result)
      
      result = driver([]int{94, 94, 94, 90, 84, 82, 75, 71, 57, 55, 53, 51, 51, 43, 35, 31, 30, 29, 22, 18, 14, 10, 7, 5, 4}, 
  	22, 4794)
      fmt.Printf("TEST-9...%s\n", result)
      
          
  }
source_py: def maximum_area_rectangle_picking_four_sides_array(arr, n):
      arr.sort(reverse=True)
      dimension = [0, 0]
      i = 0
      j = 0
      while ((i < (n - 1)) and (j < 2)):
          if (arr[i] == arr[(i + 1)]):
              dimension[j] = arr[i]
              j += 1
              i += 1
          i += 1
      return (dimension[0] * dimension[1])
source_cpp: int maximum_area_rectangle_picking_four_sides_array(vector<int> arr, int n) {
    sort(arr.begin(), arr.end(), greater < int > ( ) );
    int dimension [ 2 ] = {
      0, 0 };
      for ( int i = 0, j = 0;
      i < n - 1 && j < 2;
      i ++ ) if ( arr [ i ] == arr [ i + 1 ] ) dimension [ j ++ ] = arr [ i ++ ];
      return ( dimension [ 0 ] * dimension [ 1 ] );
    }