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:
42 + 6517 - 146 + 304 - 4759 + 148 - 3822

Ex Output:
1800


Ex Input:
7147 + 1234 - 7159 + 8304 - 934 + 3025 - 796 - 5291 - 2549

Ex Output:
11313


Ex Input:
220 - 5891 + 2603 + 7125 - 7551 - 3288

Ex Output:

7222