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: 5450 - 7077 + 4877
Example Output: 7650

Example Input: 4287 + 3355 + 4251 + 7433 + 7069
Example Output: -17821

Example Input: 4152 - 3346 - 6249 + 9268 - 8071 + 1095
Example Output:
11455