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:
1943 + 6084 + 8719 + 2400 + 8595 - 7077 + 1264

Ex Output:
-18042


Ex Input:
3126 - 612 - 9485 - 3358 + 8070

Ex Output:
8511


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

Ex Output:

7266