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:
3309 @ 2855 @ 8458 # 3671 # 4410 # 6229 # 4661 # 2777

Ex Output:
-7126


Ex Input:
7178 # 2086 # 1606 @ 4624 @ 4559 # 4855

Ex Output:
7814


Ex Input:
40 @ 3566 @ 1378 # 3392 # 4258 # 2668

Ex Output:

-5334