Really, it took me 10 minutes only to realize what does the input m stand for.

ejini战神 I don't think it's that other people can't solve it that quickly (unless they're not familiar with the fibonacci sequence). I just think a lot of people will look over the square and not see it.

Your ability to solve it in 1min does not mean others can, that's not the way how kyus were measured and evaluated ~~

And ranks can't be changed once kata is approved