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:
7961 - 5474 + 4234 - 4358 - 7627 - 2291 - 9771 + 9867 - 813

Ex Output:
24194


Ex Input:
6368 + 9565 - 7042 - 1940 - 9960

Ex Output:
15745


Ex Input:
5975 + 2313 + 7662 + 1941 - 6257 + 522 - 3446

Ex Output:

3240