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: 1808 - 5352 - 8697 + 5058 + 8777 + 8089 - 9688 + 9784

Output: -6163


Input: Consider Input: 3681 + 1303 + 5556 + 9895 - 5012 - 6662

Output: -1399


Input: Consider Input: 8157 - 2717 - 1214 + 8558 + 7391 - 7163 + 6203 - 6912


Output: 4011