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:
9852 # 24 # 2468 @ 5798 @ 6384

Ex Output:
19542


Ex Input:
634 # 6766 # 1458 # 4376 @ 9425

Ex Output:
-2541


Ex Input:
9487 # 9520 @ 4047

Ex Output:

4014