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: 463 @ 7844 # 9816

Output: -1509


Input: Consider Input: 7686 @ 8753 @ 1402 # 3760 # 9121 @ 5705 @ 9002

Output: 19667


Input: Consider Input: 2377 @ 7827 # 7131 @ 7714 @ 2156


Output: 12943