title: Difference Between Highest And Least Frequencies In An Array
signature: pub fn difference_between_highest_and_least_frequencies_in_an_array(arr: Vec<i32>, n: i32) -> i32 {
test_code: use std::collections::HashMap;
  use std::collections::HashSet;
  use std::cmp::*;
  use std::collections::*;
  use std::fmt::*; 
  
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  pub fn validate_solution(actual: i32, expected: i32)->bool{
  return actual==expected
  }
  pub fn driver(arr: Vec<i32>, n: i32, expected: i32)->String{
      if validate_solution(PLACEHOLDER_FN_NAME(arr, n), expected) {
        return "PASSED".to_string();
      };
      return "FAILED".to_string();
  
  }
  
  fn main() {
      println!("TEST-0...{}", driver(
        Vec::from([5, 15, 19, 22, 28, 29, 39, 46, 46, 49, 51, 55, 62, 69, 72, 72, 72, 74, 79, 92, 92, 93, 95, 96]), 15, 
        1
      ));
      
      println!("TEST-1...{}", driver(
        Vec::from([-92, -92, -78, -74, -70, -66, -60, -54, -50, -48, -34, -32, -26, -24, -22, -14, -10, -10, -6, 2, 4, 6, 12, 18, 34, 42, 52, 56, 76, 92, 92]), 30, 
        1
      ));
      
      println!("TEST-2...{}", driver(
        Vec::from([0, 0, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]), 24, 
        0
      ));
      
      println!("TEST-3...{}", driver(
        Vec::from([1, 5, 13, 17, 21, 22, 25, 26, 29, 29, 31, 32, 35, 38, 40, 46, 48, 48, 49, 53, 54, 59, 61, 65, 65, 66, 73, 79, 81, 83, 92, 92, 93, 96, 97, 98]), 29, 
        1
      ));
      
      println!("TEST-4...{}", driver(
        Vec::from([-70, -34, -32, -30, -14, 80, 86, 90]), 4, 
        0
      ));
      
      println!("TEST-5...{}", driver(
        Vec::from([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, 1, 1, 1, 1, 1]), 23, 
        0
      ));
      
      println!("TEST-6...{}", driver(
        Vec::from([9]), 0, 
        0
      ));
      
      println!("TEST-7...{}", driver(
        Vec::from([10, 42, 70, 94]), 2, 
        0
      ));
      
      println!("TEST-8...{}", driver(
        Vec::from([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]), 24, 
        0
      ));
      
      println!("TEST-9...{}", driver(
        Vec::from([3, 4, 7, 8, 10, 15, 15, 17, 22, 26, 49, 55, 60, 64, 76, 79, 80, 84, 90, 92, 95, 96]), 20, 
        1
      ));
      
  }
source_py: def difference_between_highest_and_least_frequencies_in_an_array(arr, n):
      arr.sort()
      count = 0
      max_count = 0
      min_count = n
      for i in range(0, (n - 1)):
          if (arr[i] == arr[(i + 1)]):
              count += 1
              continue
          else:
              max_count = max(max_count, count)
              min_count = min(min_count, count)
              count = 0
      return (max_count - min_count)
source_cpp: int difference_between_highest_and_least_frequencies_in_an_array(vector<int> arr, int n) {
    sort(arr.begin(), arr.end());
    int count = 0, max_count = 0, min_count = n;
    for ( int i = 0;
    i < ( n - 1 );
    i ++ ) {
      if ( arr [ i ] == arr [ i + 1 ] ) {
        count += 1;
        continue;
      }
      else {
        max_count = max ( max_count, count );
        min_count = min ( min_count, count );
        count = 0;
      }
    }
    return ( max_count - min_count );
  }