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:
2020 @ 8125 # 252 # 2790 # 9183 @ 3123 # 7282 # 5115 # 1943

Ex Output:
-13297


Ex Input:
4532 @ 5773 @ 2346 @ 6961 # 8280

Ex Output:
11332


Ex Input:
28 # 9266 @ 3846 # 8930 # 5637 @ 2017 # 1054 # 8700

Ex Output:

-27696