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:
7065 # 7713 # 7473 # 664 # 8030

Ex Output:
-16815


Ex Input:
7924 @ 8575 # 3974 @ 6720

Ex Output:
19245


Ex Input:
8489 # 6527 @ 4497 @ 4732 @ 9838 # 7664 # 8293 # 5763 @ 4813

Ex Output:

4122