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: 1078 + 2128 + 513 + 5898 - 8020

Output: 559


Input: Consider Input: 5939 - 673 - 8282

Output: 14894


Input: Consider Input: 9451 - 4506 - 3698 - 5154 + 89


Output: 22720