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:
5245 # 2258 @ 1333 # 9626 @ 7040 @ 9804

Ex Output:
11538

Ex Input:
7272 @ 8958 # 7231 @ 6616

Ex Output:
15615

Ex Input:
1581 @ 6124 @ 2712 # 8091 @ 3232 # 1506 @ 1572 # 5846

Ex Output:
-222