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:
123 # 6452 # 5554 # 9261 @ 6646

Ex Output:
-14498


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

Ex Output:
6341


Ex Input:
5748 # 8780 # 3501 @ 3131

Ex Output:

-3402