Wrong ansewer!!!

can any 1 explain me what is the problem with my code

CodeChef: Practical coding for everyone after submitting its showing wrong answer.plz help.!!

Account should have enough money for Withdrawl+Bank charges. You are only checking for withdrawl. Include bank charges of 0.5 in it as well.

Eg, for input 120 120 , make sure you arent printing -0.5