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:
120 # 2644 @ 4589

Ex Output:
2065


Ex Input:
9039 @ 4996 @ 845 # 5409

Ex Output:
9471


Ex Input:
7840 # 7485 @ 4498 @ 2543 # 5463 # 4223

Ex Output:

-2290