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: 9487 # 9520 @ 4047

Output: 4014


Input: Consider Input: 523 # 5860 # 778

Output: -6115


Input: Consider Input: 4491 # 5723 @ 8093


Output: 6861