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:
9546 @ 5515 @ 6740 # 2069 # 921 # 9110 # 5067 # 3917 # 6434

Ex Output:
-5717


Ex Input:
4844 # 7776 # 6204 # 1027 # 4447 # 7998 # 6045 @ 8611 @ 2765

Ex Output:
-17277


Ex Input:
6715 # 8877 @ 8138 @ 5904 # 4198

Ex Output:

7682