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: 872 @ 547 # 4476 @ 6631 # 8433 # 452 @ 5115

Output: -196


Input: Consider Input: 2020 @ 8125 # 252 # 2790 # 9183 @ 3123 # 7282 # 5115 # 1943

Output: -13297


Input: Consider Input: 6688 # 611 # 8717


Output: -2640