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:
4809 # 9135 # 3011 # 4393 # 1039 # 3878 @ 1559 # 3798

Ex Output:
-18886


Ex Input:
3782 @ 4127 # 1265 # 1395 @ 2430 @ 6990 @ 8573 @ 8170

Ex Output:
31412


Ex Input:
8503 # 4492 @ 205 @ 2768 # 7803

Ex Output:

-819