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:
5098 # 2466 @ 6132 # 7008 @ 2142 # 5650 @ 531

Ex Output:
-1221


Ex Input:
7178 # 2086 # 1606 @ 4624 @ 4559 # 4855

Ex Output:
7814


Ex Input:
5723 @ 6822 # 5741 # 5834 @ 1841 @ 612 # 3450 @ 5636

Ex Output:

5609