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:
2673 - 123 - 5121 + 7601 + 976 + 4369 - 4232

Ex Output:
-797


Ex Input:
8213 - 7166 - 3524 + 2770 + 767 - 3629 - 7894

Ex Output:
26889


Ex Input:
6071 - 7444 - 6404 - 9586 + 2794 - 2626

Ex Output:

29337