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:
5956 # 1397 @ 8694 # 3593 # 1578

Ex Output:
8082


Ex Input:
1070 @ 5674 @ 50 # 2252

Ex Output:
4542


Ex Input:
5552 @ 1937 # 5428 # 6258

Ex Output:

-4197