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: 6340 # 5642 @ 8051 # 3877 # 2824 # 3105 # 9957 @ 9874 # 6399

Output: -7539


Input: Consider Input: 2269 # 7857 @ 1906 @ 1098 # 6308 # 1142 @ 2063

Output: -7971


Input: Consider Input: 4900 # 7450 # 73


Output: -2623