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:
5610 # 3034 @ 9312 @ 7337 @ 2731 @ 8581 @ 5926 # 2102 @ 2137

Ex Output:
36498


Ex Input:
16 @ 4157 @ 3953 @ 8863

Ex Output:
16989


Ex Input:
814 # 2416 # 6171

Ex Output:

-7773