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:
7376 @ 9212 @ 1713 # 9993

Ex Output:
8308


Ex Input:
3839 # 8343 # 3366 @ 9432 @ 4687 @ 2441 # 89

Ex Output:
8601


Ex Input:
8297 # 573 # 2652

Ex Output:

5072