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:
1948 @ 7201 @ 611 # 9763 # 2998 # 5097 # 9302 # 3012 # 8272

Ex Output:
-28684


Ex Input:
6896 @ 8548 @ 1670 @ 7550 # 921

Ex Output:
23743


Ex Input:
6219 # 3209 # 3746 @ 8160 # 4057 @ 1131

Ex Output:

4498