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:
120 # 2644 @ 4589

Ex Output:
2065


Ex Input:
1917 @ 4353 @ 4321 @ 3060 @ 6681 @ 7890 @ 8148

Ex Output:
36370


Ex Input:
2363 # 7577 @ 7611 @ 594 # 9064 @ 880 @ 4755

Ex Output:

-438