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: 7982 # 9393 @ 981 @ 2884 # 1556 @ 752 # 322 # 3235

Output: -1907


Input: Consider Input: 4100 @ 4500 @ 5166 @ 7442 @ 3258

Output: 24466


Input: Consider Input: 8825 @ 4144 # 5054 # 702


Output: 7213