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:
8053 # 8275 @ 3672 # 7233 @ 8748 # 1270 # 6997 # 7566 @ 5689

Ex Output:
-5179


Ex Input:
1446 @ 5354 # 6450 # 2821 @ 2258

Ex Output:
-213


Ex Input:
5956 # 1397 @ 8694 # 3593 # 1578

Ex Output:

8082