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:
4945 # 9916 # 656 @ 6515 # 5000 @ 6599 # 9652

Ex Output:
-7165


Ex Input:
7671 # 7716 @ 5899 @ 2520 # 497 # 24 # 16 # 840 # 9556

Ex Output:
-2559


Ex Input:
9107 @ 5654 # 8340 # 1108 @ 1497 # 1639 # 9689

Ex Output:

-4518