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:
9835 @ 3285 # 8713 # 3066

Ex Output:
1341


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

Ex Output:
-4775


Ex Input:
9007 @ 6876 # 2672 # 3947 @ 6822 @ 806 @ 4508 @ 5112

Ex Output:

26512