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: 9826 - 5862 + 4973 - 7723 - 8510 + 6631 + 9611 + 1510 + 489

Output: 8707


Input: Consider Input: 2596 + 8164 - 6385 + 6704

Output: -5887


Input: Consider Input: 4491 + 7448 - 7311 - 4589 - 7859 + 4908 + 306 - 3005 - 1284


Output: 15877