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:
3351 @ 1445 @ 5875 # 1267 # 4225 @ 4098 @ 3552

Ex Output:
12829


Ex Input:
4284 # 8233 @ 2781 # 2769 # 5560 @ 635 # 1706 @ 1965 @ 6794

Ex Output:
-1809


Ex Input:
2255 @ 2266 @ 4537

Ex Output:

9058