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: 2969 - 5770 - 665 + 516 - 1172 + 4904 - 384

Output: 5540


Input: Consider Input: 8137 + 5006 - 7743 + 1478

Output: 9396


Input: Consider Input: 8752 + 9105 - 6140 + 404 + 808 - 288 - 9648 + 7115 + 9019


Output: -1623