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:
7775 # 9805 # 8727

Ex Output:
-10757


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

Ex Output:
10988


Ex Input:
5150 @ 4961 @ 2768 @ 2336 @ 4901 @ 1754 @ 1363

Ex Output:

23233