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: 1123 - 8657 + 3476 - 5278 + 717 - 1557 + 6614 + 1549

Output: 4259


Input: Consider Input: 155 + 7497 + 4675 - 2329 - 9080 - 5510 - 2336 + 8701

Output: -1463


Input: Consider Input: 4917 + 1064 + 603 + 2809 + 2877 - 7214


Output: 4778