English: So the length, the distance between 0 and 2 is the smallest K such that there is a path length K between 0 and 2. The smallest K for example I can think about it that could be a candidate is 1. Then I ask myself is it a path of length one between 0 and 2. No it isn't, because a path of length one means there's an edge between 0 and 2. So that I put an X on it, there is no path of length one.
Telugu: కాబట్టి 0 మరియు 2 మధ్య దూరం 2. ఎందుకంటే ఇది అతిచిన్న K, ఇది ఒక మార్గం ఉంది 0 మరియు 2 మధ్య పొడవు k.