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:
877 # 7761 # 7154 # 4993 # 2712

Ex Output:
-21743


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

Ex Output:
-4313


Ex Input:
4385 @ 3168 @ 9500 @ 6008 # 6341 # 2215 # 481 # 944

Ex Output:

13080