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: 4062 - 644 + 187 - 4501 + 1736 - 230

Output: 7514


Input: Consider Input: 1259 - 2367 + 9919 + 7196 + 4121

Output: -17610


Input: Consider Input: 3950 + 3275 + 670 - 7817 + 5597 - 6267 + 3455 + 5915


Output: -878