title: Check If X Can Give Change To Every Person In The Queue
signature: pub fn check_if_x_can_give_change_to_every_person_in_the_queue(notes: 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(notes: Vec<i32>, n: i32, expected: i32)->String{
      if validate_solution(PLACEHOLDER_FN_NAME(notes, n), expected) {
        return "PASSED".to_string();
      };
      return "FAILED".to_string();
  
  }
  
  fn main() {
      println!("TEST-0...{}", driver(
        Vec::from([5, 5, 5, 10, 20]), 4, 
        1
      ));
      
      println!("TEST-1...{}", driver(
        Vec::from([5, 5, 5, 20, 10]), 5, 
        0
      ));
      
      println!("TEST-2...{}", driver(
        Vec::from([5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10]), 27, 
        1
      ));
      
      println!("TEST-3...{}", driver(
        Vec::from([10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 18]), 12, 
        0
      ));
      
      println!("TEST-4...{}", driver(
        Vec::from([5, 5, 20]), 2, 
        1
      ));
      
      println!("TEST-5...{}", driver(
        Vec::from([10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5]), 17, 
        0
      ));
      
      println!("TEST-6...{}", driver(
        Vec::from([5, 10, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5]), 7, 
        0
      ));
      
      println!("TEST-7...{}", driver(
        Vec::from([-82, -10, -78, -84, 68, 62, 10, 20, -86, -98, 92, 70, 40, -12, -20, -36, 8, -70, 6, 8, 44, -24, 8, -18, 76, -54, -14, -94, -68, -62, -24, -36, -74, 92, 92, -80, 48, 56, 94]), 31, 
        0
      ));
      
      println!("TEST-8...{}", driver(
        Vec::from([10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5]), 25, 
        0
      ));
      
      println!("TEST-9...{}", driver(
        Vec::from([46, 46, 93, 57, 82, 34, 83, 80, 77, 36, 80, 85, 69, 28, 9, 56, 49, 27, 83, 25, 1, 80, 99, 14, 69, 82, 79, 71, 74, 34]), 20, 
        0
      ));
      
  }
source_py: def check_if_x_can_give_change_to_every_person_in_the_queue(notes, n):
      fiveCount = 0
      tenCount = 0
      for i in range(n):
          if (notes[i] == 5):
              fiveCount += 1
          elif (notes[i] == 10):
              if (fiveCount > 0):
                  fiveCount -= 1
                  tenCount += 1
              else:
                  return 0
          elif ((fiveCount > 0) and (tenCount > 0)):
              fiveCount -= 1
              tenCount -= 1
          elif (fiveCount >= 3):
              fiveCount -= 3
          else:
              return 0
      return 1
source_cpp: int check_if_x_can_give_change_to_every_person_in_the_queue(vector<int> notes, int n) {
    int fiveCount = 0;
    int tenCount = 0;
    for ( int i = 0;
    i < n;
    i ++ ) {
      if ( notes [ i ] == 5 ) fiveCount ++;
      else if ( notes [ i ] == 10 ) {
        if ( fiveCount > 0 ) {
          fiveCount --;
          tenCount ++;
        }
        else return 0;
      }
      else {
        if ( fiveCount > 0 && tenCount > 0 ) {
          fiveCount --;
          tenCount --;
        }
        else if ( fiveCount >= 3 ) {
          fiveCount -= 3;
        }
        else return 0;
      }
    }
    return 1;
  }