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: 3421 - 71 + 7643 - 8661 + 520 - 6536 + 9411

Output: 1115


Input: Consider Input: 5462 - 3916 + 9462 - 8867 - 7357

Output: 16140


Input: Consider Input: 7323 + 3314 - 8986 + 6283 + 734 - 101 - 9021 + 8338 + 5871


Output: 891