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:
7152 @ 8957 # 8060 # 3668 # 8713 # 9420 # 3603

Ex Output:
-17355


Ex Input:
1131 @ 2823 # 1847 @ 6137 @ 7300 @ 27

Ex Output:
15571


Ex Input:
715 # 7159 # 7757

Ex Output:

-14201