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:
9964 + 5009 - 6772 + 8761 + 2075 + 6292 + 4157 + 5194

Ex Output:
-14752


Ex Input:
4062 - 644 + 187 - 4501 + 1736 - 230

Ex Output:
7514


Ex Input:
4851 + 3641 - 7674

Ex Output:

8884