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:
9273 # 8850 @ 3050

Ex Output:
3473


Ex Input:
3979 @ 8270 # 8338 @ 8460 # 4746 @ 5598 @ 1343 @ 9371 # 637

Ex Output:
23300


Ex Input:
215 @ 8531 @ 3147 # 3780 # 6711 @ 2691 @ 2690

Ex Output:

6783