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: 1783 + 1887 + 6517 - 3342 + 4406 + 8123 + 5394 - 5058 + 8527
Example Output: -24671

Example Input: 9510 - 1645 - 4111 + 3431 - 7584 + 4538 + 2298 + 2049 - 8099
Example Output:
18633