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: 1916 @ 5847 @ 4371

Output: 12134


Input: Consider Input: 2416 @ 4557 @ 9089 @ 8858

Output: 24920


Input: Consider Input: 6912 @ 854 # 1503 # 7597 @ 2442 # 2187 # 1980 # 4516 # 4311


Output: -11886