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: 1855 # 9818 @ 3927 @ 9533 # 8557 @ 619 # 7543 # 2844
Example Output: -12828

Example Input: 3407 @ 917 # 567 @ 5987 # 5936
Example Output: 3808

Example Input: 8421 # 1874 @ 8070 @ 6915
Example Output:
21532