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:
6120 - 9271 - 7167 + 6916 - 2510 + 7854 - 7909 - 1960 - 3775

Ex Output:
23942


Ex Input:
9240 - 5321 + 7584 - 9605 + 9674 - 5556 + 6400

Ex Output:
6064


Ex Input:
1989 - 7828 - 4806 - 7481 + 9860 - 9696 - 7086 + 272 + 8952

Ex Output:

19802