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:
3393 # 1959 # 4338 # 8197 @ 3993 # 7625 # 7892

Ex Output:
-22625


Ex Input:
5406 @ 9263 @ 7443 @ 6591 # 7496 @ 2721 # 7867

Ex Output:
16061


Ex Input:
6108 @ 6734 @ 3016 @ 637 # 2671 # 5486 # 1133 @ 1713 # 2180

Ex Output:

6738