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: 1162 @ 622 # 7209 @ 3448

Output: -1977


Input: Consider Input: 6374 # 6362 # 4384 @ 4744 @ 8116 # 1470

Output: 7018


Input: Consider Input: 9270 # 7458 @ 8054


Output: 9866