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: 7027 @ 2812 @ 3081 @ 8945 # 18 # 3273 @ 222 # 6452 # 5838

Output: 6506


Input: Consider Input: 1664 # 2003 # 3533

Output: -3872


Input: Consider Input: 9243 @ 9185 # 5378 @ 673 @ 1372 # 566 # 7789


Output: 6740