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:
1529 @ 8982 @ 3470 @ 7611 @ 9000

Ex Output:
30592


Ex Input:
2863 @ 9899 # 2358

Ex Output:
10404


Ex Input:
3491 # 1932 # 7843 # 3919 # 689 @ 9376 @ 826 @ 2455

Ex Output:

1765