title: Find The Element Before Which All The Elements Are Smaller Than It And After Which All Are Greater Than It
signature: findTheElementBeforeWhichAllTheElementsAreSmallerThanItAndAfterWhichAllAreGreaterThanIt(arr, n) {
test_code: import 'dart:convert';
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  bool validateSolution(int actual, int expected){
      return actual.toString() == expected.toString();
  }
  
  String driver(arr, n, int expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(arr, n), expected)){
              return "PASSED";
          }
          return "FAILED";
      }catch(exception_object){
          return exception_object.runtimeType.toString();
      }
  }
  
  int main() {
  
      print("TEST-0...${driver(
          [4, 24, 30, 33, 56, 67, 87, 90], 4, 
          3)
      }");
  
      print("TEST-1...${driver(
          [72, -48, 12, 4, 46, 36, 2, 58, 82, -88, -14, 56, 90, 76, 18, -6, -28, 18, 88, 90, 40, -68, -10, -82, -28, 16, 32, -90, 12, -86, -16, 78, -98, -52, -26, 80, 6, 50, 40, -12, 52, 38, -92, 94, -32, 14, -80, -88, 48], 28, 
          -1)
      }");
  
      print("TEST-2...${driver(
          [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], 30, 
          -1)
      }");
  
      print("TEST-3...${driver(
          [51, 87, 46, 76, 2, 89, 56, 34, 49, 61, 44, 73, 14, 60, 89], 11, 
          -1)
      }");
  
      print("TEST-4...${driver(
          [-90, -90, -80, -72, -68, -64, -62, -62, -60, -46, -44, -44, -44, -42, -42, -32, -22, -22, -18, -2, 4, 6, 10, 12, 14, 30, 34, 34, 40, 56, 56, 56, 58, 68, 74, 78, 78, 82, 84, 86, 88, 90, 92], 29, 
          28)
      }");
  
      print("TEST-5...${driver(
          [0, 0, 0, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0], 26, 
          -1)
      }");
  
      print("TEST-6...${driver(
          [7, 8, 11, 12, 15, 17, 28, 34, 57, 61, 66, 76, 92], 9, 
          8)
      }");
  
      print("TEST-7...${driver(
          [-22, -96, -78, -60, 34, -18, 86, -42, -78, 76, 8, 28, -80, 80, 6, -72, 34, 66, 84, 50, -4, 18, 72, -66, -68, -24, 56, -12, -70, 24, -82], 19, 
          -1)
      }");
  
      print("TEST-8...${driver(
          [0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1], 9, 
          -1)
      }");
  
      print("TEST-9...${driver(
          [79, 81, 55, 6, 78, 93, 81, 33, 29, 1, 27, 49, 21, 58, 22, 65, 44, 95, 6, 51, 75, 42, 14, 55, 79, 82, 90, 8, 15, 15, 53, 98, 76, 43, 33], 30, 
          -1)
      }");
  
      return 0;
  }
source_py: def find_the_element_before_which_all_the_elements_are_smaller_than_it_and_after_which_all_are_greater_than_it(arr, n):
      leftMax = ([None] * n)
      leftMax[0] = float('-inf')
      for i in range(1, n):
          leftMax[i] = max(leftMax[(i - 1)], arr[(i - 1)])
      rightMin = float('inf')
      for i in range((n - 1), (- 1), (- 1)):
          if ((leftMax[i] < arr[i]) and (rightMin > arr[i])):
              return i
          rightMin = min(rightMin, arr[i])
      return (- 1)
source_cpp: int find_the_element_before_which_all_the_elements_are_smaller_than_it_and_after_which_all_are_greater_than_it(vector<int> arr, int n) {
    int leftMax [ n ];
    leftMax [ 0 ] = INT_MIN;
    for ( int i = 1;
    i < n;
    i ++ ) leftMax [ i ] = max ( leftMax [ i - 1 ], arr [ i - 1 ] );
    int rightMin = INT_MAX;
    for ( int i = n - 1;
    i >= 0;
    i -- ) {
      if ( leftMax [ i ] < arr [ i ] && rightMin > arr [ i ] ) return i;
      rightMin = min ( rightMin, arr [ i ] );
    }
    return - 1;
  }