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:
2370 # 437 # 89 # 6625 # 2724 @ 1767 # 2848 @ 3753

Ex Output:
-4833


Ex Input:
8280 # 2607 # 4185 # 9243 @ 9839

Ex Output:
2084


Ex Input:
341 @ 3128 # 561

Ex Output:

2908