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:
9835 @ 3285 # 8713 # 3066

Ex Output:
1341


Ex Input:
1753 # 4314 @ 3538 # 7342 @ 6326 @ 6393 @ 136 @ 161 @ 4337

Ex Output:
10988


Ex Input:
9218 # 208 # 8601 # 6368 # 2578

Ex Output:

-8537