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

Ex Output:
-2211


Ex Input:
126 @ 8943 @ 2476 # 7766 @ 2271 # 7213 @ 6602 # 8086 @ 2129

Ex Output:
-518


Ex Input:
6497 @ 3449 @ 860

Ex Output:

10806