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:
9835 @ 3285 # 8713 # 3066

Ex Output:
1341


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

Ex Output:
11909


Ex Input:
3529 @ 2441 @ 1274 # 3916 @ 9691 @ 1272 # 1286

Ex Output:

13005