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:
3677 + 3282 + 6324 + 6039 + 2578 - 7896 + 671 + 4192

Ex Output:
-11513


Ex Input:
8737 - 2978 - 6717

Ex Output:
18432


Ex Input:
9886 + 3912 + 2116 + 1246 + 1851 + 4114 - 862 - 6407

Ex Output:

3916