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:
8213 + 7145 + 5203 - 2621 + 1654 - 1844

Ex Output:
-1324


Ex Input:
5110 + 3408 + 3582

Ex Output:
-1880


Ex Input:
338 + 2609 + 1245 - 9652 - 1065 + 1210 - 2246 - 8505 + 4721

Ex Output:

12021