title: Number Ordered Pairs Ai Aj 0
signature: pub fn number_ordered_pairs_ai_aj_0(a: 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(a: Vec<i32>, n: i32, expected: i32)->String{
      if validate_solution(PLACEHOLDER_FN_NAME(a, n), expected) {
        return "PASSED".to_string();
      };
      return "FAILED".to_string();
  
  }
  
  fn main() {
      println!("TEST-0...{}", driver(
        Vec::from([17, 20, 32, 35, 35, 36, 43, 47, 59, 59, 68, 69, 70, 70, 75, 82, 88, 94, 96, 99]), 17, 
        54
      ));
      
      println!("TEST-1...{}", driver(
        Vec::from([-78, -40, 58, -36, 34, -12, -38, 48, -66, 16, 50, -26, -22, 46, -70, -68, -44, -52, -78, -50]), 11, 
        6
      ));
      
      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, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]), 23, 
        506
      ));
      
      println!("TEST-3...{}", driver(
        Vec::from([49, 57, 17, 37, 56, 61, 10, 3, 33, 33, 70, 35, 50, 85, 48, 65, 83, 21, 96, 19, 66, 43, 69, 17, 60, 87, 82, 3, 83, 44, 63, 19, 55, 58, 77, 76, 50, 96]), 37, 
        172
      ));
      
      println!("TEST-4...{}", driver(
        Vec::from([-94, -88, -86, -80, -80, -72, -64, -60, -58, -58, -58, -50, -44, -32, -8, -8, 0, 6, 8, 10, 14, 14, 18, 28, 34, 34, 46, 54, 56, 56, 56, 64, 66, 66, 70, 82, 84, 88, 96]), 33, 
        266
      ));
      
      println!("TEST-5...{}", driver(
        Vec::from([1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0]), 13, 
        100
      ));
      
      println!("TEST-6...{}", driver(
        Vec::from([1, 3, 10, 11, 13, 14, 15, 17, 20, 25, 26, 26, 27, 29, 32, 36, 36, 36, 42, 46, 47, 49, 51, 54, 54, 55, 60, 66, 67, 68, 68, 68, 72, 77, 78, 79, 83, 84, 92, 98]), 32, 
        238
      ));
      
      println!("TEST-7...{}", driver(
        Vec::from([-76, -72, 16, 38, -60, 44, -2, -76, -76, -56, 40, 36, 50, -50, -32, 48, -96, 80, 84, 60, 84, 38, -54, -42, 48, 30, 66, -62, -52, -94, 64, -16, 54, 98]), 28, 
        116
      ));
      
      println!("TEST-8...{}", driver(
        Vec::from([0, 0, 1, 1, 1, 1]), 5, 
        14
      ));
      
      println!("TEST-9...{}", driver(
        Vec::from([63, 82, 22, 84, 11, 62, 18, 43, 57, 25, 4, 27, 62, 46, 55, 16, 1, 9, 10, 73, 36, 80, 95, 87, 47, 64, 27, 25, 70]), 22, 
        108
      ));
      
  }
source_py: def number_ordered_pairs_ai_aj_0(a, n):
      count = 0
      for i in range(0, n):
          for j in range((i + 1), n):
              if ((a[i] & a[j]) == 0):
                  count += 2
      return count
source_cpp: int number_ordered_pairs_ai_aj_0(vector<int> a, int n) {
    int count = 0;
    for ( int i = 0;
    i < n;
    i ++ ) {
      for ( int j = i + 1;
      j < n;
      j ++ ) if ( ( a [ i ] & a [ j ] ) == 0 ) count += 2;
    }
    return count;
  }