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:
126 @ 8943 @ 2476 # 7766 @ 2271 # 7213 @ 6602 # 8086 @ 2129

Ex Output:
-518


Ex Input:
9961 @ 1681 @ 7757 # 4226 @ 3563 # 8397 # 9396 @ 6986

Ex Output:

7929