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:
9060 + 6995 - 9090 + 8450 - 5246 + 5012

Ex Output:
2939


Ex Input:
6800 + 2564 + 8444 + 1912

Ex Output:
-6120


Ex Input:
1021 - 2896 - 8239 - 5207 - 1962 - 5346

Ex Output:

24671