walk riverside Mino silently take note somethingTime Mino think aloudwhattime tide wait man explain Mino my take river remind thisAnd recordingyou tide everything period I think I ve figure say Mino confidencedoubtfully Kanno peek Minos record the record express string s character 0 1 0 denote low tide 1 denote high tide denote unknown high lowyou help Mino determine possible replace independently 0 1 give integer p period result string in case answer yes replacement MinoIn problem positive integer p consider period string s 1 leq leq lvert s rvert p ith pth character s here lvert s rvert length s