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: 16 @ 4157 @ 3953 @ 8863
Example Output: 16989

Example Input: 931 # 5023 @ 6056 # 4419 # 1833 @ 5052 @ 1632 # 2282 @ 9337
Example Output: 9451

Example Input: 4284 # 7547 # 4478 # 3941 @ 9791 # 3691 @ 6936
Example Output:
1354