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: 7217 @ 2604 @ 9974 @ 8133 @ 8987 # 6381 # 7662

Output: 22872


Input: Consider Input: 4284 # 8233 @ 2781 # 2769 # 5560 @ 635 # 1706 @ 1965 @ 6794

Output: -1809


Input: Consider Input: 7060 @ 2741 @ 9987 # 8458 @ 552 @ 4860 # 977


Output: 15765