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:
3529 @ 2441 @ 1274 # 3916 @ 9691 @ 1272 # 1286

Ex Output:
13005


Ex Input:
6348 # 2614 @ 3559 @ 9670 # 1137 # 9684

Ex Output:
6142


Ex Input:
5813 @ 3746 @ 8938 @ 7100 @ 6584 @ 4863 # 8837 # 1669 # 6199

Ex Output:

20339