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:
610 # 7967 # 8700 # 5966 @ 4310 @ 9963 # 8525

Ex Output:
-16275


Ex Input:
4970 @ 8711 @ 6188

Ex Output:
19869


Ex Input:
3254 # 200 @ 4450 # 6393 # 2480 @ 4564 @ 9650

Ex Output:

12845