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:
5571 @ 5729 # 6405 # 526 # 1330

Ex Output:
3039


Ex Input:
9776 # 6717 # 9329 @ 6055 # 8635 @ 6132 @ 3374

Ex Output:
656


Ex Input:
8351 @ 2090 @ 160

Ex Output:

10601