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:
7982 # 9393 @ 981 @ 2884 # 1556 @ 752 # 322 # 3235

Ex Output:
-1907


Ex Input:
7600 # 427 @ 1816 # 5605 @ 6794 @ 7489 @ 2172 @ 5162

Ex Output:

25001