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:
9504 # 5838 @ 6008 @ 5759 @ 2689

Ex Output:
18122


Ex Input:
8816 # 8770 # 5004

Ex Output:
-4958


Ex Input:
1141 # 4623 @ 6131 @ 3357

Ex Output:

6006