50 years, 50 colors Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1516 Accepted Submission(s): 818 Problem Description On Octorber 21st, HDU 50-year-celebration, 50-color balloons floating aroun…

题目:点击打开链接 题意:每个格子有不同颜色的气球用不同数字表示,每次可选某一行              或某一列来戳气球.每个人有K次机会.求最后哪些气球不能在             k次机会内被戳破.将这些气球的编号按升序输出. 分析:行列匹配,每种颜色的气球都要判断,故dfs传参时加一个气球的              编号. 感想:1.开始以为要按照最大匹配数按升序排列,昨天wa了一下午,把我搞郁闷了.                     今天重新看题,是要按照id来排序.  …

50 years, 50 colors Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1695    Accepted Submission(s): 931 Problem Description On Octorber 21st, HDU 50-year-celebration, 50-color balloons floating…

50 years, 50 colors Problem Description On Octorber 21st, HDU 50-year-celebration, 50-color balloons floating around the campus, it's so nice, isn't it? To celebrate this meaningful day, the ACM team of HDU hold some fuuny games. Especially, there wi…

50 years, 50 colors Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description On Octorber 21st, HDU 50-year-celebration, 50-color balloons floating around the campus, it's so nice, isn't it? To celebrate…

Muddy Fields Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 10044   Accepted: 3743 Description Rain has pummeled the cows' field, a rectangular grid of R rows and C columns (1 <= R <= 50, 1 <= C <= 50). While good for the grass,…

在一个n*m的草地上,.代表草地,*代表水,现在要用宽度为1,长度不限的木板盖住水, 木板可以重叠,但是所有的草地都不能被木板覆盖. 问至少需要的木板数. 这类题的建图方法: 把矩阵作为一个二分图,以行列分别作为2个顶点集 首先以每一行来看,把这一行里面连续的*编号,作为一个顶点 再以每一列来看,把这一列里面连续的*编号,作为一个顶点 则每一个*都有2个编号,以行看时有一个,以列看时有一个,则把这2个编号连边,容量为1 再建一个源点,连接所有行的编号,一个汇点,连接所有列的编号 这道题要求的是,…

题目链接:http://61.187.179.132/JudgeOnline/problem.php?id=3140 题意:最近在生物实验室工作的小T遇到了大麻烦. 由于实验室最近升级的缘故,他的分格实验皿是一个长方体,其尺寸为a*b*c.为了实验的方便,它被划分为a*b*c个单位立方体区域,每个单位立方体尺寸为1*1*1.用(i,j,k)标识一个单位立方体,1 ≤i≤a,1≤j≤b,1≤k≤c.这个实验皿已经很久没有人用了,现在,小T被导师要求将其中一些单位立方体区域进 行消毒操作(每个区域可…

http://poj.org/problem?id=3041 Asteroids Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 12601   Accepted: 6849 Description Bessie wants to navigate her spaceship through a dangerous asteroid field in the shape of an N x N grid (1 <= N <…

Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6701    Accepted Submission(s): 3358 Problem Description As we all know, machine scheduling is a very classical problem in comput…