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:
1737 # 3662 # 9496 @ 694

Ex Output:
-10727


Ex Input:
9049 # 6438 @ 8686 # 910 # 3586

Ex Output:
6801


Ex Input:
6210 @ 5731 # 8224 # 3381 @ 3645

Ex Output:

3981