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 smallest to largest. For example, the sorted sequence A, B, C, D implies that A < B, B < C and C < D.…

poj 1094 Sorting It All Out Time Limit:1000MS     Memory Limit:10000KB     64bit IO Format:%lld & %llu 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: 24505   Accepted: 8487 Description An ascending sorted sequence of distinct values is one in which some form of a less-than operator is use…

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 smallest to largest. For example, the sorted sequence A, B, C, D implies that A < B, B < C and C < D.…

题意:是否唯一确定顺序,根据情况输出 #include <iostream> #include<cstdio> #include<cstring> #include<stack> using namespace std; /* run this program using the console pauser or add your own getch, system("pause") or input loop */ #define N…

http://poj.org/problem?id=1094 #include <cstdio> #include <cstring> #include <vector> using namespace std; int in[27],out[27]; char index[27]; bool vis[27]; int mem[27][27]; int n,m; int tlen; bool floyd(){ for(int i=0;i<n;i++){ for(i…

题目大意:就是给定一组字母的大小关系判断他们是否能组成唯一的拓扑序列. 是典型的拓扑排序,但输出格式上确有三种形式: 1.该字母序列有序,并依次输出: 2.判断该序列是否唯一: 3.该序列字母次序之间是否有矛盾,即是否有环存在: 而这三种形式的判断是有顺序的:先判断(3)是否有环,再判断是否有序(1),最后才能判断是否能得出结果(2).注意:对于(2)必须遍历完整个图,而(1)和(3)一旦得出结果,对后面的输入就不用做处理了. #include<cstdio> #include<cstr…

#include<cstdio> #include<cstring> #include<vector> #include<queue> using namespace std; const int maxn=100+10; int n,m; vector<int> G[maxn];//G[i]表示i节点所指向的所有其他点 int in[maxn];//节点入度 bool topo()//判断该图是否可拓扑排序 { queue<int>…

https://vjudge.net/problem/POJ-1094 题意 对于N个大写字母,给定它们的一些关系,要求判断出经过多少个关系之后可以确定它们的排序或者排序存在冲突,或者所有的偏序关系用上之后依旧无法确定唯一的排序. 分析 拓扑排序模板题.唯一麻烦点的是判断在第几个式子就可以确定关系.由于在题目中,每个元素的关系都是严格定义的,那么当队列中存在不止一个入度为0的顶点时,可以认为未能成功排序,即还需要更多条件.当拓扑排序算法进行完后,拓扑序列的个数不够,则认为排序出现了矛盾. #in…

Triangle LOVE Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 3566    Accepted Submission(s): 1395 Problem Description Recently, scientists find that there is love between any of two people. For…