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.

Example Input: 298 + 1699 + 1367 + 5001
Example Output: -7769

Example Input: 8967 + 529 - 1163 - 2651 + 7174 - 2929
Example Output: 8007

Example Input: 7950 + 2636 + 6004 + 4048 - 7315 - 9049 + 6781 - 9743 + 9685
Example Output:
4903