题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5352 看题看得心好累. 题目大意: 给出 n 个点,依次执行 m 次操作:输入“1 x”时,表示将与 x 连通的点全部修复:输入“2 x y”,表示在 x 与 y 之间加一条边:输入“3 x y”,表示删除 x 与 y 之间的边.题目确保不会与重边并且操作合法. 题目会给出 k,要求每次修复的的点的数目小于等于k. 问:怎样执行操作1,使得令修复点数最多的同时,令每次执行操作1所修复的点的数目所构成…
Problem Description XYZ is playing an interesting game called "drops". It is played on a r∗c grid. Each grid cell is either empty, or occupied by a waterdrop. Each waterdrop has a property "size". The waterdrop cracks when its size is…
Problem Description In an n∗m maze, the right-bottom corner is the exit (position (n,m) is the exit). In every position of this maze, there is either a 0 or a 1 written on it. An explorer gets lost in this grid. His position now is (1,1), and he want…
Description Mr. Hdu is interested in Greatest Common Divisor (GCD). He wants to find more and more interesting things about GCD. Today He comes up with Range Greatest Common Divisor Query (RGCDQ). What’s RGCDQ? Please let me explain it to you gradual…
pid=5379">http://acm.hdu.edu.cn/showproblem.php? pid=5379 Problem Description Little sun is an artist. Today he is playing mahjong alone. He suddenly feels that the tree in the yard doesn't look good. So he wants to decorate the tree.(The tree has…