题目传送门 /* 题意:选择k个m长的区间,使得总和最大 01背包:dp[i][j] 表示在i的位置选或不选[i-m+1, i]这个区间,当它是第j个区间. 01背包思想,状态转移方程:dp[i][j] = max (dp[i-1][j], dp[i-m][j-1] + sum[i] - sum[i-m]); 在两个for循环,每一次dp[i][j]的值都要更新 */ #include <cstdio> #include <cstring> #include <algorit…

Codeforces Round #267 (Div. 2) C. George and Job题目链接请点击~ The new ITone 6 has been released recently and George got really keen to buy it. Unfortunately, he didn't have enough money, so George was going to work as a programmer. Now he faced the follow…

A #include <iostream> #include<cstdio> #include<cstring> #include<algorithm> #include<stdlib.h> #include<vector> #include<cmath> #include<queue> #include<set> using namespace std; #define N 100000 #def…

题意:给一篇文章,再给一些单词替换关系a b,表示单词a可被b替换,可多次替换,问最后把这篇文章替换后(或不替换)能达到的最小的'r'的个数是多少,如果'r'的个数相等,那么尽量是文章最短. 解法:易知单词间有二元关系,我们将每个二元关系建有向边,然后得出一张图,图中可能有强连通分量(环等),所以找出所有的强连通分量缩点,那个点的minR,Len赋为强连通分量中最小的minR,Len,然后重新建图,跑一个dfs即可得出每个强连通分量的minR,Len,最后O(n)扫一遍替换单词,统计即可. 代码…

                                              C. George and Job   The new ITone 6 has been released recently and George got really keen to buy it. Unfortunately, he didn't have enough money, so George was going to work as a programmer. Now he faced t…

题目: A. George and Accommodation time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output George has recently entered the BSUCP (Berland State University for Cool Programmers). George has a friend Al…

D. Fedor and Essay time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output After you had helped Fedor to find friends in the «Call of Soldiers 3» game, he stopped studying completely. Today, the E…

D. Fedor and Essay time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output After you had helped Fedor to find friends in the «Call of Soldiers 3» game, he stopped studying completely. Today, the E…

After you had helped George and Alex to move in the dorm, they went to help their friend Fedor play a new computer game «Call of Soldiers 3». The game has (m + 1) players and n types of soldiers in total. Players «Call of Soldiers 3» are numbered for…

After you had helped George and Alex to move in the dorm, they went to help their friend Fedor play a new computer game «Call of Soldiers 3». The game has (m + 1) players and n types of soldiers in total. Players «Call of Soldiers 3» are numbered for…