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:
7211 # 614 @ 1584 # 4857 # 1495 # 1821 # 2219

Ex Output:
-2211


Ex Input:
9646 # 9392 @ 7231 @ 7510 # 4746 # 2757 # 2536 @ 5415 # 2152

Ex Output:
8219


Ex Input:
9502 @ 9602 @ 1688 @ 4151 @ 9395

Ex Output:

34338