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:
6020 + 1977 + 708 + 1899 + 3704

Ex Output:
-2268


Ex Input:
1884 + 3670 - 3893 + 782 + 3288 - 7463 + 3214

Ex Output:
2286


Ex Input:
3866 + 8228 - 3380 - 1343 - 9664

Ex Output:

10025