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: 306 + 2346 - 7752 + 7173

Output: -1461


Input: Consider Input: 4224 + 9155 + 116 - 5148 - 7166 - 7397 - 3883 - 2139

Output: 20686


Input: Consider Input: 9649 + 1046 + 6780 - 6655 + 3088 + 2033 + 3027 + 9408 + 6560


Output: -15638