title: Count Number Of Occurrences Or Frequency In A Sorted Array
signature: pub fn count_number_of_occurrences_or_frequency_in_a_sorted_array(arr: Vec<i32>, n: i32, x: 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, x: i32, expected: i32)->String{
      if validate_solution(PLACEHOLDER_FN_NAME(arr, n, x), expected) {
        return "PASSED".to_string();
      };
      return "FAILED".to_string();
  
  }
  
  fn main() {
      println!("TEST-0...{}", driver(
        Vec::from([16, 18, 24, 27, 34, 36, 41, 43, 43, 52, 59, 76, 86, 87, 90, 91, 94, 96, 98, 98]), 14, 43, 
        2
      ));
      
      println!("TEST-1...{}", driver(
        Vec::from([64, 66, -36]), 1, 64, 
        1
      ));
      
      println!("TEST-2...{}", driver(
        Vec::from([0, 0, 0]), 2, 0, 
        2
      ));
      
      println!("TEST-3...{}", driver(
        Vec::from([9, 85, 34, 43, 70, 96, 44, 7, 27, 33, 34, 5, 91, 84, 76, 45, 20, 37, 15, 37, 20, 24, 13, 49, 74, 13, 50, 81, 81, 66, 23, 36, 91, 80, 61, 15, 96, 70, 90, 25, 16, 62, 75, 63, 6, 65, 38, 12]), 43, 5, 
        1
      ));
      
      println!("TEST-4...{}", driver(
        Vec::from([-98, -98, -98, -34, -32, -26, -12, 0, 18, 52, 68, 72]), 11, -98, 
        3
      ));
      
      println!("TEST-5...{}", driver(
        Vec::from([1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1]), 11, 1, 
        5
      ));
      
      println!("TEST-6...{}", driver(
        Vec::from([1, 3, 6, 6, 10, 12, 15, 16, 21, 22, 23, 29, 33, 37, 40, 40, 43, 52, 55, 59, 64, 65, 71, 72, 80, 83, 86, 86, 88, 88]), 29, 40, 
        2
      ));
      
      println!("TEST-7...{}", driver(
        Vec::from([-14, -30, -38, -38, -8, 40, -34, 2, -84, 68, -42, 38, -14, 0, -64, 12, -2, -38, -8, -44, -88, -34, -80, -36, 82, 70, 96, -32, 16, -52, -12, -46, -28, -86, 30, -14, 50, -44, 22, 30, -4, 78, 52]), 39, 26, 
        0
      ));
      
      println!("TEST-8...{}", driver(
        Vec::from([1, 1, 1, 1]), 2, 3, 
        0
      ));
      
      println!("TEST-9...{}", driver(
        Vec::from([11, 50, 1, 93, 12, 7, 55, 35, 36, 62, 61, 71, 16]), 11, 8, 
        0
      ));
      
  }
source_py: def count_number_of_occurrences_or_frequency_in_a_sorted_array(arr, n, x):
      res = 0
      for i in range(n):
          if (x == arr[i]):
              res += 1
      return res
source_cpp: int count_number_of_occurrences_or_frequency_in_a_sorted_array(vector<int> arr, int n, int x) {
    int res = 0;
    for ( int i = 0;
    i < n;
    i ++ ) if ( x == arr [ i ] ) res ++;
    return res;
  }