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: 1709 # 2270 # 1077 # 9681

Output: -11319


Input: Consider Input: 3765 @ 8333 @ 5726

Output: 17824


Input: Consider Input: 9182 # 1609 @ 7788 @ 8615


Output: 23976