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:
9808 + 7071 + 9458 - 8326 - 6406 - 6771 - 1321 + 4712

Ex Output:
11391


Ex Input:
318 - 2977 - 9352 - 3082 - 5224 + 3028 - 7022

Ex Output:
24947


Ex Input:
4777 - 4253 + 2008 + 74 - 9553 - 873

Ex Output:

17374