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:
2214 @ 2042 # 8931

Ex Output:
-4675


Ex Input:
2027 # 965 # 9916 @ 7199 @ 844 @ 9780

Ex Output:
8969


Ex Input:
7376 @ 9212 @ 1713 # 9993

Ex Output:

8308