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“.”能走，“#”不能走，“@”为起点，求所有能走到的地方。 BFS： DFS： 阅读全文
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题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=1372 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Problem Descripti 阅读全文
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time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output time limit per test 2 seconds time limit 阅读全文
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题目大意：题目很长哈，简单来说，数轴上有n个石子，第i个石头的坐标为Di，现在要从0跳到L，每次条都从一个石子跳到相邻的下一个石子。现在FJ允许你移走M个石子，问移走这M个石子后，相邻两个石子距离的最小值的最大值是多少，因为移动有很多种方法，每一种有一个最小值距离，这些最小值里面的最大值（我之所以解释最后一句，是因为我兄弟他没懂--其实不是我翻译的，嘿嘿）。 思路：在这里二分的对象当然是距离咯... 阅读全文
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和HDU 1789 - Doing Homework again一个套路 阅读全文
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Time Limit: 12000/6000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 5505 Accepted Submission(s): 1320 Problem Descr 阅读全文
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time limit per test 5 seconds memory limit per test 256 megabytes input standard input output standard output time limit per test 5 seconds time limit 阅读全文
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time limit per test 2 seconds memory limit per test 512 megabytes input standard input output standard output time limit per test 2 seconds time limit 阅读全文
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Description Farmer John has built a new long barn, with N (2 <= N <= 100,000) stalls. The stalls are located along a straight line at positions x1,... 阅读全文
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题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=1789 Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Problem Descripti 阅读全文
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Description Assume the coasting is an infinite straight line. Land is in one side of coasting, sea in the other. Each small island is a point locating 阅读全文
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Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 13982 Accepted: 5349 Description A group of N people wishes to go across a river with only 阅读全文
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Problem Description A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15 阅读全文
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time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output time limit per test 2 seconds time limit 阅读全文
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题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=2602 Many years ago , in Teddy’s hometown there was a man who was called “Bone Collector”. This man lik 阅读全文
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Problem Description 穿过幽谷意味着离大魔王lemon已经无限接近了！可谁能想到，yifenfei在斩杀了一些虾兵蟹将后，却再次面临命运大迷宫的考验，这是魔王lemon设下的又一个机关。要知道，不论何人，若在迷宫中被困1小时以上，则必死无疑！可怜的yifenfei为了去救MM，义无 阅读全文
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题目链接：http://acm.split.hdu.edu.cn/showproblem.php?pid=2955 Problem Description The aspiring Roy the Robber has seen a lot of American movies, and knows 阅读全文
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Problem Description 在讲述DP算法的时候，一个经典的例子就是数塔问题，它是这样描述的： 有如下所示的数塔，要求从顶层走到底层，若每一步只能走到相邻的结点，则经过的结点的数字之和最大是多少？ 已经告诉你了，这是个DP的题目，你能AC吗? Input 输入数据首先包括一个整数C,表示 阅读全文
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Problem Description Given a sequence a[1],a[2],a[3]......a[n], your job is to calculate the max sum of a sub-sequence. For example, given (6,-1,5,4,-7 阅读全文
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Largest Rectangle in a Histogram Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 17635 Accepted 阅读全文