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:
643 @ 9262 # 6489 @ 1803 @ 6271

Ex Output:
11490


Ex Input:
123 # 6452 # 5554 # 9261 @ 6646

Ex Output:
-14498


Ex Input:
5010 @ 1778 @ 6035 # 887 # 1896 # 4285

Ex Output:

5755