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:
8600 - 7082 + 49 + 8639 - 7036

Ex Output:
14030


Ex Input:
6667 - 31 + 1584 - 1542 - 6475 + 9319 + 2509 - 1895

Ex Output:
3198


Ex Input:
3677 - 6266 + 8956

Ex Output:

987