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:
3249 @ 313 @ 7029 @ 5721 @ 7626

Ex Output:
23938


Ex Input:
445 # 5783 # 3236 # 9634 # 2299 # 2757 @ 3895 @ 5353 # 5757

Ex Output:
-19773


Ex Input:
7661 @ 9044 @ 9064 @ 7403 # 9872 # 9404 # 5843 @ 3313 # 3207

Ex Output:

8159