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:
4101 @ 2536 # 502

Ex Output:
6135


Ex Input:
3438 # 3865 # 956 # 3020 @ 2696

Ex Output:
-1707


Ex Input:
8922 @ 1618 @ 7360 @ 4732 # 1386 @ 1854

Ex Output:

23100