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:
4993 - 9334 - 5415 + 8531 - 5640 + 896 + 3114 - 1984

Ex Output:
14825


Ex Input:
8552 - 1559 - 9197 - 2232

Ex Output:
21540


Ex Input:
1231 + 6657 - 8263

Ex Output:

2837