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:
1559 @ 760 # 5027 # 8544 @ 4623 # 9238

Ex Output:
-15867


Ex Input:
2285 @ 1970 @ 4720

Ex Output:
8975


Ex Input:
7531 # 4699 @ 707 @ 926 # 5232 # 5657 @ 5592 @ 2775

Ex Output:

1943