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:
1262 # 4309 # 2911

Ex Output:
-5958


Ex Input:
5593 # 298 @ 3600 # 3812

Ex Output:

5083