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: 877 # 7761 # 7154 # 4993 # 2712

Output: -21743


Input: Consider Input: 9024 # 5882 # 8531 # 9692 # 8354 @ 9065 # 1468

Output: -15838


Input: Consider Input: 8041 @ 2390 # 6620 # 7206 @ 2971


Output: -424