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:
4470 @ 7285 # 4583 @ 9451 # 3236 # 3108 # 2875

Ex Output:
7404


Ex Input:
3147 @ 2272 # 9050

Ex Output:
-3631


Ex Input:
8063 # 6833 # 5604 # 8302 @ 3811 @ 2723 @ 2293 @ 6384

Ex Output:

2535