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:
5211 # 3266 @ 3042 @ 254 # 7823 @ 4298 # 8042 # 1629 # 6738

Ex Output:
-14693


Ex Input:
5265 @ 8995 # 365 # 6720 @ 438 # 9846 # 1190 @ 1943 # 9835

Ex Output:
-11315


Ex Input:
5768 @ 7018 # 2472 @ 730 @ 6454 # 635

Ex Output:

16863