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:
6120 # 9271 # 7167 @ 6916 # 2510 @ 7854 # 7909 # 1960 # 3775

Ex Output:
-11702


Ex Input:
519 @ 9686 @ 3145 # 9320

Ex Output:
4030


Ex Input:
8220 # 9787 @ 1100 # 7425

Ex Output:

-7892