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

Ex Output:
-16190


Ex Input:
9673 @ 7136 # 4171 # 8296 @ 655

Ex Output:
4997


Ex Input:
6511 @ 6932 # 5876 @ 845 @ 9035 # 4359 @ 7478

Ex Output:

20566