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:
9673 @ 7136 # 4171 # 8296 @ 655

Ex Output:
4997


Ex Input:
2994 # 4380 @ 6720

Ex Output:
5334


Ex Input:
8601 # 3414 # 1752 # 209 # 7559 # 2326 @ 1070 @ 4664

Ex Output:

-925