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:
5837 # 1015 # 4725

Ex Output:
97


Ex Input:
6506 # 8715 @ 5800 @ 1904 @ 3642

Ex Output:
9137


Ex Input:
114 # 218 @ 2684 # 5378 # 1215 # 1360 @ 1605

Ex Output:

-3768