这两题比赛做的时候各种卡,太久没有写过这种类型的题目了.各种细节想不清楚. 赛后看下网上大部分题解的代码,发现大部分都是直接用TRIE+暴力直接搞的--!,随便找了份代码发现有些数据这种做法是超时的,比如n=m=1,然后下面两行长度为100000的全为a的字符串.明显直接暴力DFS复杂度为n*n. 比赛的时候,还想用26*100000*log(n)然后用STL来去重复,结果直接超时果真STL还是太耗时了... 1260解法: 因为字符串集合S中N个字符串是两两不同的(这点比较关键,利用这点可以减…

The Suspects Time Limit: 1000MS   Memory Limit: 20000K Total Submissions: 21472   Accepted: 10393 Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global threat in mid-March 2003. T…

题目1 : Trie树 时间限制:10000ms 单点时限:1000ms 内存限制:256MB 描述 小Hi和小Ho是一对好朋友,出生在信息化社会的他们对编程产生了莫大的兴趣,他们约定好互相帮助,在编程的学习道路上一同前进. 这一天,他们遇到了一本词典,于是小Hi就向小Ho提出了那个经典的问题:“小Ho,你能不能对于每一个我给出的字符串,都在这个词典里面找到以这个字符串开头的所有单词呢?” 身经百战的小Ho答道:“怎么会不能呢!你每给我一个字符串,我就依次遍历词典里的所有单词,检查你给我的字符串…

Balanced Lineup Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 32820   Accepted: 15447 Case Time Limit: 2000MS Description For the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer Joh…

Babelfish Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 30816   Accepted: 13283 Description You have just moved from Waterloo to a big city. The people here speak an incomprehensible dialect of a foreign language. Fortunately, you have…

Shortest Prefixes Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 12731   Accepted: 5442 Description A prefix of a string is a substring starting at the beginning of the given string. The prefixes of "carbon" are: "c", &qu…

Hat’s Words Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7282    Accepted Submission(s): 2639 Problem Description A hat’s word is a word in the dictionary that is the concatenation of exactly…

What Are You Talking About Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 102400/204800 K (Java/Others)Total Submission(s): 12617    Accepted Submission(s): 4031 Problem Description Ignatius is so lucky that he met a Martian yesterday. But…

统计难题 Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 131070/65535 K (Java/Others)Total Submission(s): 16905    Accepted Submission(s): 7273 Problem Description Ignatius最近遇到一个难题,老师交给他很多单词(只有小写字母组成,不会有重复的单词出现),现在老师要他统计出以某个字符串为前缀的单词数量(单词本身也是自己的前…

Biorhythms Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 110991   Accepted: 34541 Description Some people believe that there are three cycles in a person's life that start the day he or she is born. These three cycles are the physical,…