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:
958 # 263 # 1097 @ 3868 # 3982

Ex Output:
-516


Ex Input:
7720 @ 5171 # 6139 @ 480

Ex Output:
7232


Ex Input:
1123 # 8657 @ 3476 # 5278 @ 717 # 1557 @ 6614 @ 1549

Ex Output:

-2013