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: 8341 + 2746 - 2959 - 9678 + 5173 + 317

Output: 12742


Input: Consider Input: 3257 + 8564 + 826


Output: -6133