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:
1278 @ 4628 @ 2357 @ 3694 @ 5775 @ 8542 # 793

Ex Output:
25481


Ex Input:
415 @ 1312 # 9916 @ 9168 @ 1911

Ex Output:
2890


Ex Input:
4414 @ 9387 @ 814 @ 628

Ex Output:

15243