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:
2144 - 4158 + 4207

Ex Output:
2095


Ex Input:
3384 - 2434 - 5567

Ex Output:
11385


Ex Input:
6359 + 537 + 3347 - 7523 - 1162 + 3434 - 6261

Ex Output:

13987