In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

Example Input: 4054 + 5873 - 3926 - 2524 + 5551 - 1721
Example Output: 801

Example Input: 7298 + 5069 + 5167 + 9387 - 6886
Example Output: -5439

Example Input: 9652 + 9953 - 9957 - 1823 + 2835 - 9602 + 2162 - 2555
Example Output:
18639