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:
693 # 2562 @ 733 # 3913 @ 310

Ex Output:
-4739


Ex Input:
1614 @ 5794 # 2578

Ex Output:
4830


Ex Input:
5787 @ 2012 # 3009 # 2675 # 482

Ex Output:

1633