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: 240 - 438 + 497 - 5901 - 1960 + 4782 + 6400 - 4055

Output: 915


Input: Consider Input: 8571 - 5985 + 8912

Output: 5644


Input: Consider Input: 1049 - 9060 - 9087 + 7319 + 9479 + 3232 + 8371 - 4423


Output: -4782