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: 3462 @ 9743 @ 8298

Output: 21503


Input: Consider Input: 440 @ 5472 # 6900 # 3389

Output: -4377


Input: Consider Input: 2383 # 6766 # 8395 # 9319


Output: -22097