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: 573 - 2172 + 3067 + 6526 - 4690
Example Output: -2158

Example Input: 6055 - 7226 + 1875 + 7504 - 1238 - 4445 + 412 - 5560
Example Output: 14733

Example Input: 3934 + 5905 - 3275 - 247 + 5160 + 3309
Example Output:
-6918