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: 2020 @ 862 # 5780

Output: -2898


Input: Consider Input: 6904 # 1007 @ 9690 @ 9967 @ 9620 @ 4765

Output: 39939


Input: Consider Input: 1253 # 3266 @ 340


Output: -1673


