原文地址:北大POJ题库使用指南 北大ACM题分类主流算法: 1.搜索 //回溯 2.DP(动态规划)//记忆化搜索 3.贪心 4.图论 //最短路径.最小生成树.网络流 5.数论 //组合数学(排列组合).递推关系.质因数法 6.计算几何 //凸壳.同等安置矩形的并的面积与周长.凸包计算问题 8.模拟 9.数据结构 //并查集.堆.树形结构 10.博弈论 11.CD有正气法题目分类: 1. 排序 1423, 1694, 1723, 1727, 1763, 1788, 1828, 1838, 1…

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排序 题目大意:给定多个ACGT序列,按照字母顺序算出逆序数,按逆序数从小到大排列 这题其实很简单,我们只要用一个归并排序算逆序数,然后快排就可以了(插入排序也可以,数据量不大),但是要注意的是他要保持原来的顺序,fcmop那里要写当a.inverse=b.inverse时,返回0 #include <iostream> #include <functional> #include <algorithm> using namespace std; typedef…

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…

点击打开链接 DNA Sorting Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 75164   Accepted: 30115 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…

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…

#include<stdio.h> #include<string.h> #include<algorithm> #include<stdlib.h> ][]; int m,n; ]; int cal(int i){ ; ;j<n;j++){ for(k=j;k<n;k++){ if(arr[i][k]<arr[i][j]){ num++; } } } return num; } int main(){ int i,j,k,temp,fla…

DNA Sorting Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 83069 Accepted: 33428 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, i…