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:
1982 # 4772 # 2392 # 1023 # 9072 @ 1042 @ 2606 # 2557 @ 1145

Ex Output:
-13041


Ex Input:
473 # 2568 @ 9771 # 2525 @ 3277 @ 261 # 8230 @ 6021

Ex Output:
6480


Ex Input:
1898 # 838 # 9095 # 4396 @ 4302 @ 9851 # 1997 # 4041

Ex Output:

-4316