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:
1482 # 6461 @ 804 # 8626 # 8564

Ex Output:
-21365


Ex Input:
808 # 5395 # 5187 @ 8140 @ 2751 @ 1624 # 2083 @ 6224 # 8604

Ex Output:
-1722


Ex Input:
8720 @ 4444 @ 4666

Ex Output:

17830