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:
6915 @ 3564 # 9197 # 9440 # 1112 @ 382 @ 9681 # 6512 # 9658

Ex Output:
-15377


Ex Input:
7376 @ 9212 @ 1713 # 9993

Ex Output:
8308


Ex Input:
9024 # 5882 # 8531 # 9692 # 8354 @ 9065 # 1468

Ex Output:

-15838