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:
1021 # 2896 # 8239 # 5207 # 1962 # 5346

Ex Output:
-22629


Ex Input:
7720 @ 5171 # 6139 @ 480

Ex Output:
7232


Ex Input:
295 # 220 # 3290

Ex Output:

-3215