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:
1691 - 755 + 5734 - 4774 + 4915 - 7249 - 47

Ex Output:
3867


Ex Input:
6681 - 1947 - 955 + 9470 - 4512 - 9603 + 5822 + 9404 - 8896

Ex Output:
7898


Ex Input:
241 + 931 - 4887 + 9250 - 9392 - 6365

Ex Output:

10704