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:
7065 # 7713 # 7473 # 664 # 8030

Ex Output:
-16815


Ex Input:
2416 @ 4557 @ 9089 @ 8858

Ex Output:
24920


Ex Input:
7839 # 926 @ 3188 # 9847 @ 2138 @ 6569

Ex Output:

8961