Submission for the exact track of PACE 2021. Login on optil.io: ValBart, ValBartL, Grrr
Run the following commands in the directory where CMakeLists.txt is located:
cmake .
make
mainoptil < <path to .gr file>
We are using the open-source library for linear programming Clp (https://github.com/coin-or/Clp)
You can find the solver description here