comefrom: <awangdev>239. Sliding Window Maximum_1.java
code: private void inQueue(Deque<Integer> deque, int num) {
  
          while (!deque.isEmpty() && deque.peekLast() < num) { 
              deque.pollLast();
          }
          deque.offerLast(num);
      }
masked: private void var_0 ( Deque < Integer > var_3 , int var_4 ) {
    while ( ! var_3 . isEmpty ( ) && var_3 . peekLast ( ) < var_4 ) {
      var_3 . pollLast ( ) ;
    }
    var_3 . offerLast ( var_4 ) ;
  }
  