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:
4291 + 2761 - 4339 + 8922

Ex Output:
-3053


Ex Input:
1785 - 7105 - 7217 - 2262 - 9687 - 8283 - 9761 - 7664

Ex Output:
53764


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

Ex Output:

-6477