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: 8398 - 1163 + 8396 + 4440 + 9289

Output: -12564


Input: Consider Input: 9467 + 7102 - 1964

Output: 4329


Input: Consider Input: 1998 - 2330 - 450 - 3167


Output: 7945