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:
2269 + 7840 - 467 - 5626

Ex Output:
522


Ex Input:
2480 - 8716 + 5571 - 504 - 4905 - 392 - 5105 + 906

Ex Output:
15625


Ex Input:
1656 - 2355 + 4098 + 8586 + 7634 + 9427 + 9429

Ex Output:

-35163