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:
9110 # 7535 @ 8117 # 9919 @ 6813 @ 187 # 5187

Ex Output:
1586


Ex Input:
3556 # 1722 @ 9362 # 7616 # 7893

Ex Output:
-4313


Ex Input:
7101 # 2571 @ 5405 @ 511 # 5820

Ex Output:

4626