If qr is controller , delete is action and 33 is id, then here is your solution .
rules = array(
'<controller:(qr)>-code/delete/<id:\d+>'=>'<controller>/delete',
'<controller:\w+>/<id:\d+>' => '<controller>/view',
'<controller:\w+>/<action:\w+>/<id:\d+>' => '<controller>/<action>',
'<controller:\w+>/<action:\w+>' => '<controller>/<action>',
),