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:
3276 # 8656 # 2580 @ 7528 @ 344 @ 6066 # 9323 # 6974 # 6635

Ex Output:
-16954


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

Ex Output:
13005


Ex Input:
2930 # 3543 # 6847 # 7401 # 1515 @ 9933 @ 4972 # 1211 @ 1371

Ex Output:

-1311