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:
353 # 799 @ 4824 # 3212 @ 1811 @ 752

Ex Output:
3729


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

Ex Output:
-8411


Ex Input:
7127 # 5045 # 1920 # 8991 @ 8656 # 6430 @ 8803 # 7736 @ 887

Ex Output:

-4649