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:
3385 - 6152 + 1565 - 9813 - 5112 - 2865 + 2979

Ex Output:
22783


Ex Input:
84 - 4898 - 2883 + 5111 - 7812 - 5830 + 3330 + 8500 + 6754

Ex Output:
-2188


Ex Input:
470 - 6980 - 990 - 7234 + 6950 + 395

Ex Output:

8329