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:
1855 # 9818 @ 3927 @ 9533 # 8557 @ 619 # 7543 # 2844

Ex Output:
-12828


Ex Input:
8137 @ 5006 # 7743 @ 1478

Ex Output:
6878


Ex Input:
9012 @ 4688 # 2482 # 8827 # 2749 # 259 # 8385

Ex Output:

-9002