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:
3298 @ 1140 @ 3407 # 8200 # 7383 # 6043 @ 5264

Ex Output:
-8517


Ex Input:
9938 # 267 # 6696 # 8186 # 5729 # 8517 # 6331 @ 7607

Ex Output:
-18181


Ex Input:
322 # 5229 @ 6621 @ 9463

Ex Output:

11177