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: 3385 - 6152 + 1565 - 9813 - 5112 - 2865 + 2979

Output: 22783


Input: Consider Input: 7528 - 4788 + 7674 + 4839 + 6930 + 4883 + 9734

Output: -21744


Input: Consider Input: 1721 - 4212 - 9122 + 3705


Output: 11350