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: 3385 - 6152 + 1565 - 9813 - 5112 - 2865 + 2979

Output: 22783


Input: Consider Input: 8403 + 1868 + 5827 + 5471 - 3746 + 1027 - 5777

Output: 3733


Input: Consider Input: 9394 + 650 - 1341 - 3378 + 6146 + 2804


Output: 4513