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: 1709 # 2270 # 1077 # 9681
Example Output: -11319

Example Input: 3935 # 7500 # 205 # 7262 # 5754 @ 116 # 8451 # 9591
Example Output: -34712

Example Input: 9757 # 709 @ 5670 @ 5915 @ 2765 # 3574 @ 4337
Example Output:
24161