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:
6277 # 2029 # 4158 @ 5412 # 6845 # 6694 @ 5432

Ex Output:
-2605


Ex Input:
7803 @ 6524 @ 7077 # 1627 # 3959

Ex Output:
15818


Ex Input:
434 @ 416 # 4501 # 6192 # 4074 @ 908 # 7715

Ex Output:

-20724