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: 4565 @ 7065 # 5397

Output: 6233


Input: Consider Input: 2497 # 4988 @ 8200 # 3896 @ 5601 @ 1004

Output: 8418


Input: Consider Input: 2283 # 9204 @ 120 # 6960


Output: -13761