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: 2724 @ 8119 @ 1049 @ 9004

Output: 20896


Input: Consider Input: 440 @ 5472 # 6900 # 3389

Output: -4377


Input: Consider Input: 2664 # 7028 @ 6271


Output: 1907