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: 6681 - 1947 - 955 + 9470 - 4512 - 9603 + 5822 + 9404 - 8896

Output: 7898


Input: Consider Input: 8552 - 1559 - 9197 - 2232

Output: 21540


Input: Consider Input: 1099 + 8110 + 2839 + 5692 + 3904 - 5800


Output: -13646