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:
6915 @ 3564 # 9197 # 9440 # 1112 @ 382 @ 9681 # 6512 # 9658

Ex Output:
-15377


Ex Input:
8161 @ 9287 # 6233

Ex Output:
11215


Ex Input:
9282 # 5471 @ 9965

Ex Output:

13776