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: 6203 # 8978 # 1139 @ 240 # 4716
Example Output: -8390

Example Input: 1508 # 9607 @ 9117 @ 1943 # 3539 # 8743 # 2584 @ 7819
Example Output: -4086

Example Input: 9565 # 4506 @ 5081 # 990 # 7230
Example Output:
1920