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:
240 - 438 + 497 - 5901 - 1960 + 4782 + 6400 - 4055

Ex Output:
915


Ex Input:
7147 + 1234 - 7159 + 8304 - 934 + 3025 - 796 - 5291 - 2549

Ex Output:
11313


Ex Input:
5050 + 8264 - 6236

Ex Output:

3022