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: 7427 + 8795 - 4104 + 7720 - 6667
Example Output: 1683

Example Input: 6051 + 6310 + 7813 + 2282 - 7601 + 4598 - 1928 - 9696 - 6497
Example Output: 10770

Example Input: 844 + 298 - 1227
Example Output:
1773