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: 1709 # 2270 # 1077 # 9681

Output: -11319


Input: Consider Input: 1638 # 9897 # 7637 @ 7987


Output: -7909