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:
8780 # 5826 # 420 @ 8814 @ 5786 # 1725

Ex Output:
15409


Ex Input:
5175 # 1386 # 5328 # 898 @ 5361 # 376 @ 1286 @ 861

Ex Output:
4695


Ex Input:
5405 # 3618 # 8598 # 8151

Ex Output:

-14962