title: Number Indexes Equal Elements Given Range
signature: pub fn number_indexes_equal_elements_given_range(a: Vec<i32>, n: i32, l: i32, r: 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(a: Vec<i32>, n: i32, l: i32, r: i32, expected: i32)->String{
      if validate_solution(PLACEHOLDER_FN_NAME(a, n, l, r), expected) {
        return "PASSED".to_string();
      };
      return "FAILED".to_string();
  
  }
  
  fn main() {
      println!("TEST-0...{}", driver(
        Vec::from([4, 13, 13, 16, 16, 19, 39, 41, 48, 52, 57, 62, 65, 67, 76, 84, 88, 91, 95, 96, 97, 98]), 18, 12, 17, 
        0
      ));
      
      println!("TEST-1...{}", driver(
        Vec::from([62, 76, 86, -8, 84, -6, 72, 84, 6, -50, -18, -94, 54, 90, -74, -64, -26, -14, -32, 62, 10, 4, 70, -28, 8, 18, 4, -62, -76, 84, -78, -4, 84, 98, 58, -68, 42, -6, 34, -38, 52, -84, 78]), 32, 38, 23, 
        0
      ));
      
      println!("TEST-2...{}", driver(
        Vec::from([0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1]), 10, 6, 6, 
        0
      ));
      
      println!("TEST-3...{}", driver(
        Vec::from([11, 75, 98, 29, 62, 53, 48, 91, 86, 66, 48, 94]), 8, 6, 6, 
        0
      ));
      
      println!("TEST-4...{}", driver(
        Vec::from([-94, -84, -70, -70, -40, -40, -36, -24, 10, 48, 62, 74]), 11, 7, 8, 
        0
      ));
      
      println!("TEST-5...{}", driver(
        Vec::from([1, 0, 1, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0]), 36, 40, 37, 
        0
      ));
      
      println!("TEST-6...{}", driver(
        Vec::from([1, 2, 6, 7, 10, 11, 13, 19, 19, 25, 29, 30, 32, 34, 35, 45, 45, 46, 47, 48, 48, 53, 58, 61, 64, 65, 67, 75, 76, 81, 81, 84, 84, 85, 86, 94, 94, 96, 99]), 25, 19, 37, 
        4
      ));
      
      println!("TEST-7...{}", driver(
        Vec::from([-56, 42, -34, -12, -86, 82, -96, -66, 30, 16, -40, 72, 84, 94, -48, -30, 26, 50, 42, -44, -50, 22, -38, 8, 34, 94, 2, 16, -32, 18, -58, 12, -26, 28, -62]), 21, 30, 26, 
        0
      ));
      
      println!("TEST-8...{}", driver(
        Vec::from([0, 0, 0, 0, 1, 1, 1]), 4, 5, 5, 
        0
      ));
      
      println!("TEST-9...{}", driver(
        Vec::from([6, 29]), 1, 1, 1, 
        0
      ));
      
  }
source_py: def number_indexes_equal_elements_given_range(a, n, l, r):
      count = 0
      for i in range(l, r):
          if (a[i] == a[(i + 1)]):
              count += 1
      return count
source_cpp: int number_indexes_equal_elements_given_range(vector<int> a, int n, int l, int r) {
    int count = 0;
    for ( int i = l;
    i < r;
    i ++ ) if ( a [ i ] == a [ i + 1 ] ) count += 1;
    return count;
  }