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:
4612 @ 9447 # 3444 @ 1269

Ex Output:
11884


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

Ex Output:
-19773


Ex Input:
3468 @ 2257 @ 4757 # 5161 @ 7315 # 6648 @ 9536 @ 8934 @ 2815

Ex Output:

27273