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:
9285 # 5492 @ 6629 # 5477 @ 5969 # 8754

Ex Output:
2160


Ex Input:
6860 @ 2810 # 1038

Ex Output:
8632


Ex Input:
5518 @ 8953 # 7916 # 4792 @ 1124 # 8498 # 9674 @ 6516

Ex Output:

-8769