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:
2131 + 4513 + 3760 - 9342 + 7779 + 4653 + 3111

Ex Output:
-12343


Ex Input:
2036 + 7313 - 8908 - 1870 - 5159 + 5945 + 5006 + 635 + 5551

Ex Output:
-6477


Ex Input:
722 + 8671 + 6361 - 7305 - 6820 + 7506 + 5890 + 7888

Ex Output:

-21469