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:
6484 # 6042 @ 239 # 5161 # 7940 @ 2882 @ 8393 # 311 @ 6933

Ex Output:
5477


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

Ex Output:
10776


Ex Input:
8261 @ 6687 @ 9418

Ex Output:

24366