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.

Ex Input:
9625 - 1139 - 9303

Ex Output:
20067


Ex Input:
9909 - 1362 + 9804 + 5190 + 8223 - 3758

Ex Output:
-8188


Ex Input:
2989 + 6050 + 6197 + 3604 - 83 + 3193

Ex Output:

-15972