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:
8109 @ 8997 # 3310 # 8023 @ 2548 @ 9625 # 7170

Ex Output:
10776


Ex Input:
6543 @ 9353 @ 2169 # 4681 @ 6446

Ex Output:
19830


Ex Input:
3238 @ 2914 @ 4122

Ex Output:

10274