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:
2821 @ 5327 # 3350 # 3607 @ 7010 @ 6824 # 9975 # 38

Ex Output:
5012


Ex Input:
5052 # 6923 @ 1011

Ex Output:
-860


Ex Input:
8322 # 2005 @ 9462 # 3461 @ 4768 # 8814 @ 589 @ 8612

Ex Output:

17473