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:
7152 @ 8957 # 8060 # 3668 # 8713 # 9420 # 3603

Ex Output:
-17355


Ex Input:
992 # 6304 @ 9489 # 6814 # 5448 @ 4565

Ex Output:
-3520


Ex Input:
608 @ 3490 # 456 @ 1873 @ 4862

Ex Output:

10377