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: 4682 - 6673 + 4582 - 2631 + 430 - 2808 + 6340 - 7201

Output: 12643

Input: Consider Input: 8171 + 8357 + 171 - 3129 - 6929

Output: 9701

Input: Consider Input: 5781 - 5306 - 2256
Output: 13343