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: 169 + 4940 + 7593 - 4532 + 2433 - 9730 - 6448 - 3026 - 2882

Output: 11821


Input: Consider Input: 7232 + 3137 + 8890


Output: -4795