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:
7729 # 7280 @ 5072 @ 3806 # 6060

Ex Output:
3267


Ex Input:
2466 @ 2676 # 4536 @ 607 # 2511 # 8482

Ex Output:

-9780