Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 33184 Accepted: 11545 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from s…
Sorting It All Out poj-1094 题目大意:给出一些字符串之间的大小关系,问能否得到一个唯一的字符串序列,满足权值随下标递增. 注释:最多26个字母,均为大写. 想法:显然,很容易想到用toposort处理,对于每一个刚刚读入的大小关系,我们对进行一次拓扑排序,由于点数最多是26,所以总时间复杂度是$10^2$的.然后通过题面,可以发现第一个和第三个判定依据是可以中途退出的,而第二个条件是必须最后才可以判断的.但是由于poj的多组数据,我们必须要将所有的数据都读入完毕才能达…
比较模板的topological-sort题,关键在于每个元素都严格存在唯一的大小关系,而一般的拓扑排序只给出一个可能解,这就需要每趟排序的过程中监视它是不是总坚持一条唯一的路径. 算法导论里面的拓扑排序运用的是DFS the DAG,记录每个顶点的进入时间和离开时间,根据其先后插入单链表的做法.而我认为一种方法是更直观的,就是维护一个入度为0的顶点集合(我用的队列其实没差),每次对其中一个加入结果序列——同时删除它的所有出边——更新其他点的入度的做法,在我的算法数据结构实现模板里有正确实现ht…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 29744 Accepted: 10293 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from s…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 29539 Accepted: 10233 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from s…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 32275 Accepted: 11210 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from s…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 30110 Accepted: 10411 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from s…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 40012 Accepted: 14072 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements fr…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions:39731 Accepted: 13975 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from sm…
http://poj.org/problem?id=1094 Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 38379 Accepted: 13534 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is us…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 29539 Accepted: 10233 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from s…
Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 37764 Accepted: 13327 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is used to order the elements from s…
题目链接:http://poj.org/problem?id=1094 Sorting It All Out Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 35468 Accepted: 12458 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator…
两道拓扑排序问题的范例,用拓扑排序解决的实质是一个单向关系问题 POJ1094(ZOJ1060)-Sortng It All Out 题意简单,但需要考虑的地方很多,因此很容易将code写繁琐了,会给力求code精简的强迫症患者一个警醒- - 题意:给出m组逻辑关系式,求n个字母间的排序,分排序成功-排序矛盾-不能确定三种情况输出相应语句 题解:拓扑排序,访问入度为0的结点,邻接点入度-1,然后继续访问入度为0的结点...直到访问完成为止 需要注意的地方在于三种情况根据最早确定的情况来输出,例如…
