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:
1721 # 7193 # 7392 # 8999 # 7847 @ 5571 @ 4439 @ 7158 # 6030

Ex Output:
-18572


Ex Input:
4324 # 426 # 9171 # 980 @ 9454 @ 9720 # 7367 # 9266 # 1237

Ex Output:
-4949


Ex Input:
285 @ 2856 @ 2862 # 5576 # 2240 # 548

Ex Output:

-2361


