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: 7924 @ 8575 # 3974 @ 6720

Output: 19245


Input: Consider Input: 8109 @ 8997 # 3310 # 8023 @ 2548 @ 9625 # 7170

Output: 10776


Input: Consider Input: 5049 @ 7409 @ 3167 @ 3700 # 2660


Output: 16665