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:
381 # 4084 # 9377 # 3092

Ex Output:
-16172


Ex Input:
6904 # 1007 @ 9690 @ 9967 @ 9620 @ 4765

Ex Output:
39939


Ex Input:
6045 # 817 # 277 @ 9966 # 5161 # 7538 @ 5314

Ex Output:

7532