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:
3529 @ 2441 @ 1274 # 3916 @ 9691 @ 1272 # 1286

Ex Output:
13005


Ex Input:
1278 @ 4628 @ 2357 @ 3694 @ 5775 @ 8542 # 793

Ex Output:
25481


Ex Input:
8849 @ 7677 # 8546 # 7027 # 2707 # 8084 @ 6385

Ex Output:

-3453