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:
2611 @ 6783 @ 8407 # 5813 @ 4138

Ex Output:
16126


Ex Input:
2678 # 5467 @ 8355 # 3124 # 5654

Ex Output:
-3212


Ex Input:
5125 @ 8390 # 2867 # 333 # 924 # 3146 @ 4397 @ 3882 # 1351

Ex Output:

13173