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:
3112 - 4832 - 7889 - 6855 - 5294 - 5908 + 9757 - 9064

Ex Output:
33197


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

Ex Output:
-14752


Ex Input:
361 + 6371 - 4950

Ex Output:

-1060