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

Ex Output:
10988


Ex Input:
531 # 4183 # 6445 # 8517 @ 4076 # 9925

Ex Output:
-24463


Ex Input:
3623 @ 8826 @ 2607

Ex Output:

15056