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:
1861 - 3929 + 4952 - 8280

Ex Output:
9118


Ex Input:
5774 + 1888 + 5355 - 6957 - 7140 - 9762

Ex Output:
22390


Ex Input:
4867 - 7162 + 1616 - 596 - 7845 + 9594 - 3650 + 6833

Ex Output:

6077