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:
1510 + 8779 + 5742 - 9951 - 2155

Ex Output:
-905


Ex Input:
7053 - 797 + 1011 - 43 - 2798 - 1572 - 4498

Ex Output:
15750


Ex Input:
3578 - 4389 + 1116 + 9376 + 5527 - 9722 + 5476 + 1540 - 3667

Ex Output:

-1679