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:
1256 - 3248 - 3709 - 3019

Ex Output:
11232


Ex Input:
2349 - 9730 - 8231 + 6983 + 9097 + 6965 - 2760

Ex Output:
25


Ex Input:
7588 - 3722 + 3147 - 6562 + 3830

Ex Output:

10895