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: 2653 @ 9718 # 3237 @ 2973 # 6895 # 18

Output: 5194


Input: Consider Input: 6484 # 6042 @ 239 # 5161 # 7940 @ 2882 @ 8393 # 311 @ 6933

Output: 5477


Input: Consider Input: 8182 # 3734 # 4578 @ 6774 # 2600 @ 5895


Output: 9939