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: 136 + 9772 - 2848 - 4980 + 6156 - 883 + 5407 + 3211

Output: -15699


Input: Consider Input: 7388 - 3073 - 1891 + 2180 + 1361 - 9381 + 566 - 2665

Output: 20291


Input: Consider Input: 7798 - 8742 - 1322 - 1975 - 4528 + 6770


Output: 17595