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:
826 - 6501 - 223 + 9761 - 8863

Ex Output:
6652


Ex Input:
2980 - 6793 - 1879 + 5728 - 4199

Ex Output:
10123


Ex Input:
673 - 3964 + 5282 - 3849 + 4924 - 6649

Ex Output:

4929