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: 3709 + 206 - 4363 + 3129 + 2506

Output: 2231


Input: Consider Input: 9096 - 7913 + 7375 + 7790

Output: 1844


Input: Consider Input: 9100 - 8262 + 5806 + 9403 - 7416 + 4982 - 4247 + 8680 + 1792


Output: -1638