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:
4681 # 7765 @ 9516 @ 4570 @ 2862

Ex Output:
13864


Ex Input:
6055 # 1440 # 3272 # 5643 @ 150 @ 7658 # 8655 @ 8463 # 8156

Ex Output:
-4840


Ex Input:
2105 @ 7070 # 2557 @ 4209 @ 1396 @ 4590 @ 6131 # 2265 # 4851

Ex Output:

15828