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:
5274 @ 8123 @ 5544 @ 7060 # 1023

Ex Output:
24978


Ex Input:
4809 # 9135 # 3011 # 4393 # 1039 # 3878 @ 1559 # 3798

Ex Output:
-18886


Ex Input:
8967 @ 529 # 1163 # 2651 @ 7174 # 2929

Ex Output:

9927