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:
4616 @ 2249 # 272 @ 618 # 4242 @ 6599 @ 8683 @ 1628 # 7090

Ex Output:
12789


Ex Input:
8050 # 8744 @ 5247 # 7761 # 8743

Ex Output:
-11951


Ex Input:
8622 # 2825 @ 1409 # 593 # 5009 @ 3092 @ 9780

Ex Output:

14476