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:
3462 @ 9743 @ 8298

Ex Output:
21503


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

Ex Output:
-19513


Ex Input:
5409 # 5550 @ 3864 # 5911 @ 5222

Ex Output:

3034