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:
4586 # 8527 @ 5828 @ 460 @ 1195

Ex Output:
3542


Ex Input:
8041 @ 762 @ 8091 @ 6500

Ex Output:
23394


Ex Input:
3580 @ 2817 # 4754

Ex Output:

1643