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:
1296 @ 9756 @ 2493 @ 9940 # 5147 # 5428 # 5741 # 828

Ex Output:
6341


Ex Input:
6385 # 7829 @ 2463 @ 3411 # 652 # 5880 # 6454

Ex Output:
-8556


Ex Input:
4551 # 6416 # 9506 @ 7913

Ex Output:

-3458