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:
5473 - 4337 - 6499 - 9119

Ex Output:
25428


Ex Input:
6589 - 9791 + 4411 + 1562 - 9983

Ex Output:
20390


Ex Input:
4535 - 2042 + 2684

Ex Output:

3893