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:
9786 @ 7240 # 8099 @ 100 @ 4573 @ 5982 @ 9270 @ 9911 # 8249

Ex Output:
30514


Ex Input:
16 @ 4157 @ 3953 @ 8863

Ex Output:
16989


Ex Input:
5471 # 1532 # 8417

Ex Output:

-4478