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:
643 @ 9262 # 6489 @ 1803 @ 6271

Ex Output:
11490


Ex Input:
1040 # 6682 @ 4286 # 1132 # 705 @ 4048 # 9240

Ex Output:
-8385


Ex Input:
1097 @ 3008 @ 4127

Ex Output:

8232