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:
1861 - 3929 + 4952 - 8280

Ex Output:
9118


Ex Input:
6178 - 1637 - 8197 - 6437 + 4591 - 6995 + 3562 + 9474

Ex Output:
11817


Ex Input:
6199 - 9863 - 8197 - 3975 + 1000 + 740 + 3216 + 2122 - 4226

Ex Output:

25382