Joker return Gotham City execute evil plan in Gotham City N street junction number 1 N M street number 1 M each street connect distinct junction junction connect streetfor evil plan Joker need use odd number street form cycle that junction S positive integer k sequence junction S s_1 ldot s_k S street connect S s_1 b s_k s c s_i1 s_i 2 ldot kHowever police control street Gotham City on day monitor different subset street consecutive number j l_i leq j leq r_i these monitored street joker plan course unfortunately police Joker spy Gotham City Police Department tell street monitor day Now Joker wants find give number day execute evil plan on day cycle street consist odd number street monitor day