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:
8197 @ 9504 @ 5465 # 6573 @ 8964 @ 6026

Ex Output:
31583


Ex Input:
1294 # 4752 # 8113 @ 9201 @ 8582 # 7189 @ 2849

Ex Output:
1872


Ex Input:
4950 # 7520 # 2396

Ex Output:

-4966