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:
5137 @ 4207 @ 1156

Ex Output:
10500


Ex Input:
4975 @ 6986 # 1863 # 5616 @ 5201 # 572 @ 7186 # 5860 @ 1949

Ex Output:

12386