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:
7127 # 5045 # 1920 # 8991 @ 8656 # 6430 @ 8803 # 7736 @ 887

Ex Output:
-4649


Ex Input:
9285 # 5492 @ 6629 # 5477 @ 5969 # 8754

Ex Output:
2160


Ex Input:
7712 @ 5747 @ 5055

Ex Output:

18514