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: 3407 @ 917 # 567 @ 5987 # 5936

Output: 3808


Input: Consider Input: 2724 @ 8119 @ 1049 @ 9004

Output: 20896


Input: Consider Input: 693 # 2562 @ 733 # 3913 @ 310


Output: -4739