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: 381 # 4084 # 9377 # 3092

Output: -16172


Input: Consider Input: 2994 # 4380 @ 6720

Output: 5334


Input: Consider Input: 8663 # 6734 # 8794 # 5963


Output: -12828


