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

Example Input: 6884 @ 145 # 2208 # 5356 # 3578 @ 606
Example Output: -3507

Example Input: 6896 @ 8548 @ 1670 @ 7550 # 921
Example Output: 23743

Example Input: 9727 # 2182 @ 8193 # 4995 # 5271
Example Output:
5472