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: 2759 - 7972 - 7615 + 151

Output: 18195


Input: Consider Input: 5127 + 1503 + 9610 + 3348

Output: -9334


Input: Consider Input: 1753 + 6393 - 2809 - 3546 + 7610 - 2795 + 2071 - 7681 - 2894


Output: 5404