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:
3384 - 2434 - 5567

Ex Output:
11385


Ex Input:
1259 - 2367 + 9919 + 7196 + 4121

Ex Output:
-17610


Ex Input:
2261 + 1803 - 5816

Ex Output:

6274