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:
5299 - 8968 + 5239 + 1119

Ex Output:
7909


Ex Input:
8838 + 1241 - 4918 - 8353 - 4691 - 5880

Ex Output:
31439


Ex Input:
5195 - 2270 + 1032 - 9878 - 9451 - 5047 + 6096 + 7036

Ex Output:

17677