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:
486 # 3873 # 1187

Ex Output:
-4574


Ex Input:
3556 # 1722 @ 9362 # 7616 # 7893

Ex Output:
-4313


Ex Input:
7263 @ 7201 # 5151 # 8087

Ex Output:

1226