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:
1229 - 4354 + 912 - 1766

Ex Output:
6437

Ex Input:
4117 - 3380 - 4784

Ex Output:
12281

Ex Input:
9936 + 2180 + 7378 - 6049 + 5281 - 5993 + 4615 + 2270 - 2870

Ex Output:
3124