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:
1294 # 4752 # 8113 @ 9201 @ 8582 # 7189 @ 2849

Ex Output:
1872


Ex Input:
4089 @ 276 @ 7408 # 9945 @ 4656

Ex Output:
6484


Ex Input:
8425 @ 8728 @ 5343 @ 4651 @ 5737 # 5661 # 6077 # 9174 # 187

Ex Output:

11785