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: 9781 # 2797 # 2134

Output: 4850


Input: Consider Input: 3164 # 160 @ 1567 # 8453 # 9293 @ 9371

Output: -3804


Input: Consider Input: 231 # 2557 @ 1972 # 2725 # 1573 # 8979 @ 9655 # 191


Output: -4167