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: 2548 @ 2442 # 6943 # 1890 @ 3686 @ 9765 # 1273

Output: 8335


Input: Consider Input: 1131 @ 2823 # 1847 @ 6137 @ 7300 @ 27

Output: 15571


Input: Consider Input: 2144 # 4158 @ 4207


Output: 2193