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:
1312 - 814 - 8592 - 4040 - 5158 + 6817

Ex Output:
13099


Ex Input:
4054 + 5873 - 3926 - 2524 + 5551 - 1721

Ex Output:
801


Ex Input:
5030 - 1051 + 3927 - 8379 - 3891 - 4383

Ex Output:

18807