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:
2806 # 6120 @ 8567 @ 1946 @ 8985 # 9834 # 368 # 454 @ 5455

Ex Output:
10983


Ex Input:
634 # 6766 # 1458 # 4376 @ 9425

Ex Output:
-2541


Ex Input:
1693 @ 352 @ 8366 # 1829 # 8585 # 6608 @ 535 # 613

Ex Output:

-6689