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:
6597 @ 1596 # 358 # 9057 @ 993

Ex Output:
-229


Ex Input:
1294 # 4752 # 8113 @ 9201 @ 8582 # 7189 @ 2849

Ex Output:
1872


Ex Input:
2110 # 4133 # 4783 @ 4862 # 9230 @ 7890 @ 7982

Ex Output:

4698