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:
7065 # 7713 # 7473 # 664 # 8030

Ex Output:
-16815


Ex Input:
7211 # 614 @ 1584 # 4857 # 1495 # 1821 # 2219

Ex Output:
-2211


Ex Input:
1006 # 647 @ 3077 # 6724 @ 7954 # 8632 # 254 @ 5192

Ex Output:

972