题目链接:http://poj.org/problem?id=1007 本题属于字符串排序问题.思路很简单,把每行的字符串和该行字符串统计出的字母逆序的总和看成一个结构体.最后把全部行按照这个总和从小到大排序即可. #include <iostream> #include <algorithm> using namespace std; struct DNA { ]; int count; } d[]; int cmp(DNA a, DNA b) { return a.count…

    DNA Sorting Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 77786   Accepted: 31201 Description One measure of ``unsortedness'' in a sequence is the number of pairs of entries that are out of order with respect to each other. For ins…

DNA Sorting Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 80832   Accepted: 32533 Description One measure of ``unsortedness'' in a sequence is the number of pairs of entries that are out of order with respect to each other. For instanc…

一. 题目 DNA Sorting Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 95052   Accepted: 38243 Description One measure of ``unsortedness'' in a sequence is the number of pairs of entries that are out of order with respect to each other. For i…

DNA Sorting Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 95437   Accepted: 38399 Description One measure of ``unsortedness'' in a sequence is the number of pairs of entries that are out of order with respect to each other. For instanc…

DNA Sorting Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 95209   Accepted: 38311 Description One measure of ``unsortedness'' in a sequence is the number of pairs of entries that are out of order with respect to each other. For instanc…

Description One measure of ``unsortedness'' in a sequence is the number of pairs of entries that are out of order with respect to each other. For instance, in the letter sequence ``DAABEC'', this measure is 5, since D is greater than four letters to…

#include<iostream>//写字符串的题目可以用这种方式:str[i][j] &str[i] using namespace std; int main() {int n,m,i,j,num,a[101],b[101],t,k; char str[101][51]; cin>>n>>m; for(i=0;i<m;i++) { cin>>str[i]; num=0; for(j=0;j<n-1;j++) for(k=j+1;k&…

 http://blog.csdn.net/geniusluzh/article/details/6619575 在说Tarjan算法解决桥和边双连通分量问题之前我们先来回顾一下Tarjan算法是如何求解强连通分量的. Tarjan算法在求解强连通分量的时候,通过引入dfs过程中对一个点访问的顺序dfsNum(也就是在访问该点之前已经访问的点的个数)和一个点可以到达的最小的dfsNum的low数组,当我们遇到一个顶点的dfsNum值等于low值,那么该点就是一个强连通分量的根.因为我们在dfs的…

题目大意:给定一个4位素数,一个目标4位素数.每次变换一位,保证变换后依然是素数,求变换到目标素数的最小步数. 解题报告:直接用最短路. 枚举1000-10000所有素数,如果素数A交换一位可以得到素数B,则在AB间加入一条长度为1的双向边. 则题中所求的便是从起点到终点的最短路.使用Dijkstra或SPFA皆可. 当然,纯粹的BFS也是可以的. 用Dijkstra算法A了题目之后,看了一下Discuss,发现了一个新名词,双向BFS. 即从起点和终点同时进行BFS,相遇则求得最短路. 借鉴了…