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: 3123 + 9519 - 2864 + 9440 - 756 + 252

Output: -12468


Input: Consider Input: 2909 + 1799 - 984 + 4910 + 3253 - 6846 - 8324 - 9048

Output: 18149


Input: Consider Input: 2141 + 2874 + 6960 - 81 - 4626 - 5906 + 6215


Output: -3295