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: 1123 - 8657 + 3476 - 5278 + 717 - 1557 + 6614 + 1549
Example Output: 4259

Example Input: 7147 + 1234 - 7159 + 8304 - 934 + 3025 - 796 - 5291 - 2549
Example Output: 11313

Example Input: 7370 - 1901 + 2631 - 4894 + 3129 - 7369 + 2205 - 3667 + 9424
Example Output:
7812