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:
808 # 5395 # 5187 @ 8140 @ 2751 @ 1624 # 2083 @ 6224 # 8604

Ex Output:
-1722


Ex Input:
8899 # 4509 # 9411 # 7373

Ex Output:
-12394


Ex Input:
7455 # 1018 # 9836 @ 3112 @ 3640 # 6423

Ex Output:

-3070