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:
8293 # 4243 # 6119 @ 5292

Ex Output:
3223


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

Ex Output:
-2211


Ex Input:
3499 @ 9035 @ 4945

Ex Output:

17479