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:
4470 @ 7285 # 4583 @ 9451 # 3236 # 3108 # 2875

Ex Output:
7404


Ex Input:
8678 @ 7424 # 7399 @ 4601 @ 9327 @ 7787 @ 2286

Ex Output:
32704


Ex Input:
8119 # 2792 # 2093 @ 2969 # 7237

Ex Output:

-1034