User blog comment:Ubersketch/CNFlex/@comment-35470197-20190908003106/@comment-35470197-20190908010626

Thank you for the supplementary explanation. I considered whether I should give more informations on "how good up to now" or not. But since he has atchieved this point by himself, I posted the least information, because checking his own programme carefully again by himself will help him to study algorithms well.