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:
7065 # 7713 # 7473 # 664 # 8030

Ex Output:
-16815


Ex Input:
2339 @ 2821 # 2234 @ 1271 @ 471

Ex Output:
4668


Ex Input:
3915 @ 4904 @ 4887 @ 7162 # 3798 @ 233 @ 1101 # 7758 # 4627

Ex Output:

6019