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:
2144 - 4158 + 4207

Ex Output:
2095


Ex Input:
2385 + 4832 + 1127

Ex Output:

-3574