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: 9001 + 6216 - 1478 + 5475 - 8693 - 3911 - 319 + 4768 - 320

Output: 7263


Input: Consider Input: 1011 - 5404 + 4286 - 549 - 4178 - 1559

Output: 8415


Input: Consider Input: 6513 + 7690 + 2038 + 5192 - 6139 + 2019 - 7754 - 3640


Output: 7107