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: 9050 + 7188 + 3589 + 8762 + 268 + 1995 + 6080 - 4900
Example Output: -13932

Example Input: 4266 - 8914 - 9115 - 7595 - 3820 + 191 + 3199 - 4910
Example Output: 35230

Example Input: 1666 - 3701 + 2060
Example Output:
3307