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: 3881 + 3747 + 6493 - 7538

Output: 1179

Input: Consider Input: 8798 - 6887 - 9478 - 7713 + 8512 + 7926 - 8604 + 2947 + 7573

Output: 14522

Input: Consider Input: 6588 - 1389 - 2750 - 3084 - 7779 + 4552 + 6094 + 3960 + 7828
Output: -844