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.

Input: Consider Input: 2297 + 4208 + 9691 - 6995 + 738 + 1245 - 7806

Output: 1216


Input: Consider Input: 4110 - 9440 + 557 + 7868 - 6315 + 2518 - 9049 + 3905 + 2052

Output: 12014


Input: Consider Input: 1211 + 4817 - 6201 + 2434 + 7280 + 5711 + 4672


Output: -17502