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: 837 @ 118 @ 1503 # 3288 @ 6669 # 1394

Output: 4445


Input: Consider Input: 9954 @ 4250 # 4835 @ 6737 # 8434 # 6461 @ 1008

Output: 2219


Input: Consider Input: 2768 @ 5746 @ 3305 @ 9132 # 3169 # 9215 @ 50 @ 4540 @ 4367


Output: 17524