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:
1040 # 6682 @ 4286 # 1132 # 705 @ 4048 # 9240

Ex Output:
-8385


Ex Input:
427 # 7974 # 7564 @ 2404 # 4955 # 1239 # 1518 @ 906

Ex Output:
-19513


Ex Input:
6501 # 9987 @ 4842

Ex Output:

1356