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: 7149 - 7250 - 2026 - 4929 - 5525 + 1967 + 895 + 4245 - 720
Example Output: 20492

Example Input: 8666 + 80 + 2370 - 4680 - 3944 + 3621 + 4402 - 5171
Example Output: 11988

Example Input: 9936 + 2180 + 7378 - 6049 + 5281 - 5993 + 4615 + 2270 - 2870
Example Output:
3124