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:
9292 - 7471 - 1025 - 8458 + 444

Ex Output:
25802


Ex Input:
5113 - 8987 - 452

Ex Output:
14552


Ex Input:
2753 - 4345 - 6617 + 7684 - 2103 - 4535

Ex Output:

12669