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:
1884 @ 3670 # 3893 @ 782 @ 3288 # 7463 @ 3214

Ex Output:
1482


Ex Input:
7671 # 7716 @ 5899 @ 2520 # 497 # 24 # 16 # 840 # 9556

Ex Output:
-2559


Ex Input:
2038 # 6659 # 3861

Ex Output:

-8482