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:
8157 - 2717 - 1214 + 8558 + 7391 - 7163 + 6203 - 6912

Ex Output:
4011


Ex Input:
1421 + 1007 + 7985 - 3779 + 7055 + 2659 - 4236 + 7922

Ex Output:

-17192