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: 8324 # 6868 # 6537

Output: -5081


Input: Consider Input: 735 @ 7682 # 2492 # 7149 @ 7531 @ 4967 @ 3646 @ 6439

Output: 21359


Input: Consider Input: 162 @ 3248 # 761 # 2406 # 3170


Output: -2927