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:
2367 @ 4877 @ 8467 @ 5488 # 987 # 8899

Ex Output:
11313


Ex Input:
5010 # 2117 @ 6121 # 6244 @ 1089 @ 5871

Ex Output:
9730


Ex Input:
8158 @ 1325 @ 395 # 4068 @ 4226 @ 7713 @ 8368 # 3297

Ex Output:

22820