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: 1162 @ 622 # 7209 @ 3448
Example Output: -1977

Example Input: 507 @ 3439 # 8086 # 5497 @ 2145 @ 2124 @ 9603 @ 2119 @ 8351
Example Output: 14705

Example Input: 2178 # 6447 @ 5843 @ 9653 @ 4633 # 5887 @ 8815 # 6635 @ 178
Example Output:
12331