In this task you will be given an arithmetic operation and you have to find its answer. The operators '+' and '-' have been replaced with new symbols. Specifically, '+' has been replaced with the symbol '@' and '-' with the symbol '#'. You need to perform the operations in the given equation return the answer

Ex Input:
992 # 6304 @ 9489 # 6814 # 5448 @ 4565

Ex Output:
-3520


Ex Input:
6607 @ 8561 @ 5571 # 6468 @ 8173 # 7134 @ 2102 # 7688

Ex Output:
9724


Ex Input:
8098 @ 8922 # 9716 @ 5360

Ex Output:

12664