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:
5398 + 4622 - 3983 - 2396 + 2403 - 2514

Ex Output:
7266


Ex Input:
3915 + 4904 + 4887 + 7162 - 3798 + 233 + 1101 - 7758 - 4627

Ex Output:
1811


Ex Input:
1206 + 1073 - 3531

Ex Output:

3664