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:
1953 - 3854 - 1362 + 6267 - 3664 - 901 + 7969 + 111

Ex Output:
-2613


Ex Input:
3384 - 2434 - 5567

Ex Output:
11385


Ex Input:
6107 + 7814 + 7408 + 8062 - 568 + 4317

Ex Output:

-20926