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: 1078 + 2128 + 513 + 5898 - 8020

Output: 559


Input: Consider Input: 519 - 9471 - 7173 - 34 - 5123 + 9104 - 2340 + 7208 - 3693

Output: 12041


Input: Consider Input: 5177 + 9496 - 845 + 5246 + 9906 + 5654 + 1721 + 5303


Output: -31304