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:
1982 # 4772 # 2392 # 1023 # 9072 @ 1042 @ 2606 # 2557 @ 1145

Ex Output:
-13041


Ex Input:
5631 # 7224 @ 9746 # 8532 @ 8996 # 3971 # 8538 @ 5270 # 9789

Ex Output:
-8411


Ex Input:
141 @ 9901 # 7718 # 9857 # 1302 # 2315 @ 9503 # 1413 # 8493

Ex Output:

-11553