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:
2026 @ 9494 # 8161

Ex Output:
3359


Ex Input:
7027 @ 2812 @ 3081 @ 8945 # 18 # 3273 @ 222 # 6452 # 5838

Ex Output:
6506


Ex Input:
6836 @ 4627 # 6250

Ex Output:

5213