2020日本信息学奥林匹克春令营在线竞赛 Day3 题目（含英文版、日文版、附件） 斟误：The English statement has a misprint in the constraints. The limits for N, M, Q should be 1 <= N <= 200 000, 1 <= M <= 200 000, 1 <= Q <= 200 000.