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: 298 @ 1699 @ 1367 @ 5001

Output: 8365


Input: Consider Input: 2186 # 2436 # 4269 # 2175 @ 4101 # 2723 @ 6192 # 7530

Output: -6654


Input: Consider Input: 9781 # 6495 # 7158


Output: -3872