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: 2131 + 4513 + 3760 - 9342 + 7779 + 4653 + 3111

Output: -12343


Input: Consider Input: 1451 - 4488 + 4665 + 526 - 3690 + 9483

Output: -5045


Input: Consider Input: 1638 - 9897 - 7637 + 7987


Output: 11185