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:
7272 @ 8958 # 7231 @ 6616

Ex Output:
15615


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

Ex Output:
-2211


Ex Input:
3084 # 1096 @ 4783 @ 794 # 1115 @ 22 # 9148 @ 6654

Ex Output:

3978