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: 1691 - 755 + 5734 - 4774 + 4915 - 7249 - 47

Output: 3867


Input: Consider Input: 8576 - 8960 - 1317 + 5701 + 5413 - 1195 + 135

Output: 8799


Input: Consider Input: 8711 + 5210 - 6763 - 7959 - 1575


Output: 19798