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:
4624 + 1072 + 9261 + 232 - 7837

Ex Output:
1896


Ex Input:
2588 + 7474 + 7336 + 2767 - 1155 - 3435 - 6693

Ex Output:
-3706


Ex Input:
8511 + 5113 - 6002 - 7115 - 6146 - 5660

Ex Output:

28321