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:
6484 # 6042 @ 239 # 5161 # 7940 @ 2882 @ 8393 # 311 @ 6933

Ex Output:
5477


Ex Input:
452 # 5631 # 8307 # 1886 @ 4631 @ 1695 @ 4411 # 769

Ex Output:
-5404


Ex Input:
9266 # 7408 @ 5644 # 7342

Ex Output:

160