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: 6844 @ 1340 # 4174 # 5664 @ 4911 # 5241

Output: -1984


Input: Consider Input: 524 @ 1123 # 5900 # 4128 # 1486 # 9545

Output: -19412


Input: Consider Input: 340 @ 7905 # 7477 @ 3478 @ 3654


Output: 7900