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: 6063 + 9874 + 5939 - 5013 + 791
Example Output: -5528

Example Input: 7720 + 5171 - 6139 + 480
Example Output:
8208