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:
9487 # 9520 @ 4047

Ex Output:
4014


Ex Input:
730 @ 7585 # 9902 # 6809 @ 286 @ 9412 @ 9282 # 3941 # 4046

Ex Output:
2597


Ex Input:
7028 @ 4320 @ 2469 @ 1901 # 9928

Ex Output:

5790