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: 1837 @ 4842 # 1682 @ 5953

Output: 10950


Input: Consider Input: 932 # 7028 @ 5402 # 9015 @ 2110

Output: -7599


Input: Consider Input: 4242 @ 4647 # 8773 # 8163 # 5175 # 2659 # 1870


Output: -17751