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.

Example Input: 2131 + 4513 + 3760 - 9342 + 7779 + 4653 + 3111
Example Output: -12343

Example Input: 7163 + 3916 + 4926 + 2532 - 2743 - 5389 + 7290
Example Output: -3369

Example Input: 9074 + 767 - 2125 - 2353 + 2147
Example Output:
10638