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:
2303 + 151 - 7031 + 7349 - 8676 + 9084 + 9773

Ex Output:
-8347


Ex Input:
8338 + 7035 - 2067 - 1210 + 9433 + 1604

Ex Output:
-6457


Ex Input:
1253 - 3266 + 340

Ex Output:

4179