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:
8354 + 2602 + 1315

Ex Output:
4437


Ex Input:
6051 + 6310 + 7813 + 2282 - 7601 + 4598 - 1928 - 9696 - 6497

Ex Output:
10770


Ex Input:
2815 - 7863 + 3838 - 6236 + 4028 - 7736 - 2846 - 9731

Ex Output:

29361