because they they were so good we tried some neural networks some rich models and the light GBM was the best model that we can that we could make and even though it was our best model we could not make it in the top ten of the leaderboard so we tried some pencils with neural network they didn't work we even tried to add some impedance coming from neural networks as new features in Nigeria and it didn't work and the running time for alleged GBM was so high that we couldn't add any importance other models because