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: 8157 - 2717 - 1214 + 8558 + 7391 - 7163 + 6203 - 6912
Example Output: 4011

Example Input: 4725 - 7780 + 1028 - 6858 + 9194 + 4680 - 3421 + 362 - 8573
Example Output: 16093

Example Input: 4081 + 212 - 3729 - 6293 + 55
Example Output:
13836