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: 1278 + 4628 + 2357 + 3694 + 5775 + 8542 - 793

Output: -22925


Input: Consider Input: 9625 - 1139 - 9303

Output: 20067


Input: Consider Input: 2581 - 7423 + 7673 - 936


Output: 3267