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:
7982 # 9393 @ 981 @ 2884 # 1556 @ 752 # 322 # 3235

Ex Output:
-1907


Ex Input:
4494 # 3982 # 3562 @ 341 @ 5494 # 3299 # 7182 # 8494

Ex Output:
-16190


Ex Input:
3916 @ 1423 # 2909 # 8961 # 9784 @ 5615

Ex Output:

-10700