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: 8213 + 7145 + 5203 - 2621 + 1654 - 1844

Output: -1324


Input: Consider Input: 5473 - 4337 - 6499 - 9119

Output: 25428


Input: Consider Input: 8741 + 335 - 9215 + 484


Output: 17137