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:
4533 - 9566 - 2287 + 4647 + 5056 + 6340 + 777 - 4673 + 2170

Ex Output:
2069


Ex Input:
344 + 4107 + 9401 + 4490 - 5191 - 1753 - 5869 + 8385 - 7325

Ex Output:
-5901


Ex Input:
7303 + 6891 + 6742 + 7231 + 1034 - 5130 - 7072 - 8141

Ex Output:

5748