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: 5474 + 1234 - 4461 - 3865 + 7635 + 830 + 5965 - 7856 + 523

Output: 5469


Input: Consider Input: 2219 - 6451 + 1224 + 2776 + 8750 - 8397 - 5833 - 9401 - 554

Output: 20105


Input: Consider Input: 2690 - 8113 - 6464 - 5657


Output: 22924