Codeforces 732F - Tourist Reform
2016-11-12
题目地址
描述 给定一个 n ( n ≤ 4 ⋅ 1 0 5 ) n(n\le 4\cdot {10}^5) n ( n ≤ 4 ⋅ 1 0 5 ) 个点, m ( m ≤ 4 ⋅ 1 0 5 ) m(m\......