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:
7347 # 9135 # 9303 @ 1078 # 3054 @ 4217 @ 4075

Ex Output:
-4775


Ex Input:
2065 @ 2103 @ 1800

Ex Output:
5968


Ex Input:
357 @ 1481 # 9736 @ 4217 # 3436 # 8967 # 4568

Ex Output:

-20652