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: 4291 + 2761 - 4339 + 8922

Output: -3053


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

Output: 22783


Input: Consider Input: 7673 - 449 + 2207 - 3141


Output: 9056