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:
5031 # 649 # 8975 @ 1853 # 5257 # 1383

Ex Output:
-9380


Ex Input:
8197 @ 9504 @ 5465 # 6573 @ 8964 @ 6026

Ex Output:
31583


Ex Input:
7875 # 6479 # 9486 # 3664 # 2371 # 7729

Ex Output:

-21854