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:
7775 # 9805 # 8727

Ex Output:
-10757


Ex Input:
995 @ 6856 @ 867 # 7415 # 9581

Ex Output:
-8278


Ex Input:
7543 @ 2259 @ 1295 # 239 @ 8516 # 9370 # 3764 @ 549

Ex Output:

6789