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

Input: Consider Input: 4809 # 9135 # 3011 # 4393 # 1039 # 3878 @ 1559 # 3798

Output: -18886


Input: Consider Input: 9540 # 9387 # 8692 @ 5008 # 4886 @ 9427 @ 3816

Output: 4826


Input: Consider Input: 1221 @ 4619 # 3319 @ 2958


Output: 5479