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.

Input: Consider Input: 8610 - 1799 + 6949 - 2118 + 2200 + 7263 + 3601 - 9571 - 1914

Output: 3999


Input: Consider Input: 5398 + 4622 - 3983 - 2396 + 2403 - 2514

Output: 7266


Input: Consider Input: 5935 - 1487 + 7631 - 4843 + 2946


Output: 1688