File Type Notes
GracefulGears.essence Essence
GracefulWheelGraphs.essence Essence
GracefulHelms.essence Essence
GracefulDoubleWheelGraphs.essence Essence
k4p2.eprime EssencePrime
k4p2.minion Minion Input Language
K4xP2Graceful.mzn MiniZinc
k4p2-graceful-graph-ortools.cc or-tools/C++