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:
6514 # 8296 # 4939 # 5783 @ 1077 @ 3237 @ 5941 # 7665 # 2408

Ex Output:
-12322


Ex Input:
3455 # 7428 @ 8056 # 5542 # 4359 @ 2897

Ex Output:

-2921