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:
9049 # 6438 @ 8686 # 910 # 3586

Ex Output:
6801


Ex Input:
9466 # 395 @ 5036 # 8315 @ 1723

Ex Output:
7515


Ex Input:
6355 # 3589 @ 7310 # 5161 @ 9803

Ex Output:

14718