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: 7924 @ 8575 # 3974 @ 6720

Output: 19245


Input: Consider Input: 2113 # 9012 @ 5533 @ 5034 # 9159 # 2169 # 9889

Output: -17549


Input: Consider Input: 4322 # 1928 # 948 # 7768 @ 3401 # 3850 @ 8990


Output: 2219