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:
4326 # 2636 @ 9431 # 1021 # 6603 # 2905 # 80 # 7174 # 3558

Ex Output:
-10220


Ex Input:
445 # 5783 # 3236 # 9634 # 2299 # 2757 @ 3895 @ 5353 # 5757

Ex Output:
-19773


Ex Input:
4040 # 5046 @ 3117 @ 7597 # 9831 @ 1867

Ex Output:

1744