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:
452 # 5631 # 8307 # 1886 @ 4631 @ 1695 @ 4411 # 769

Ex Output:
-5404


Ex Input:
5631 # 7224 @ 9746 # 8532 @ 8996 # 3971 # 8538 @ 5270 # 9789

Ex Output:
-8411


Ex Input:
6844 # 1807 # 1809 @ 4406 # 1450 # 5252 @ 2685

Ex Output:

3617