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:
5979 - 9772 + 7332

Ex Output:
8419


Ex Input:
7312 - 1598 - 5813 - 8994 + 9174 - 4767 + 4076

Ex Output:
15234


Ex Input:
6723 + 3071 - 2324

Ex Output:

5976