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:
9942 @ 4126 @ 294 @ 6323 @ 9325 # 2366 # 3185 @ 8413 @ 6924

Ex Output:
39796


Ex Input:
4364 # 2781 # 7674 # 4801 @ 898 @ 7562 @ 5925 @ 648 @ 7768

Ex Output:
11909


Ex Input:
9184 # 9939 # 7137 # 8236 @ 641

Ex Output:

-15487