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:
720 # 1309 @ 989 @ 1211 # 5749 # 7 @ 3147 # 9792 # 1243

Ex Output:
-12033


Ex Input:
1569 # 724 @ 3737 @ 6220 # 1360 # 172 # 1027 # 3566 # 9663

Ex Output:
-4986


Ex Input:
8558 # 8182 @ 9259 @ 405 # 7588 @ 7853

Ex Output:

10305