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:
3186 + 271 - 7916

Ex Output:
10831


Ex Input:
2736 - 2912 - 208

Ex Output:

5856