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: 569 + 2078 + 2757 - 9211

Output: 4945


Input: Consider Input: 8737 - 2978 - 6717

Output: 18432


Input: Consider Input: 4790 - 9348 - 7242 - 8305


Output: 29685