C - Cheapest Palindrome Keeping track of all the cows can be a tricky task so Farmer John has installed a system to automate it. He has installed on each cow an electronic ID tag that the system will read as the cows pass by a scanner. Each ID tag's…
You want to arrange the window of your flower shop in a most pleasant way. You have F bunches of flowers, each being of a different kind, and at least as many vases ordered in a row. The vases are glued onto the shelf and are numbered consecutively 1…
数塔 Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 21314 Accepted Submission(s): 12808 Problem Description 在讲述DP算法的时候,一个经典的样例就是数塔问题,它是这样描写叙述的: 有例如以下所看到的的数塔.要求从顶层走究竟层,若每一步仅仅能走到相邻的结点.则经过的结点的数字…
也是一道比赛时候没有写出来的题目,队友想到了解法不过最后匆匆忙忙没有 A 掉 What a pity... 题意:定义Beauty数是一个序列里所有不相同的数的和,求一个序列所有字序列的Beauty和 1 <= N <= 100000 解题思路:由于数据比较大,常规方法求字序列和肯定是行不通的,我们不妨这样想:因为要区别于不同的数 ,可以看成序列里的数是一个一个加进去的,每次加入一个数,统计前面序列里第一次出现新加入的这个数的位置,表达的不好, 举个例子: 1 2 3 定义dp(当前元素前面(…
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=6447 Problem DescriptionYJJ is a salesman who has traveled through western country. YJJ is always on journey. Either is he at the destination, or on the way to destination.One day, he is going to travel…
Tickets Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7196 Accepted Submission(s): 3659 Problem Description Jesus, what a great movie! Thousands of people are rushing to the cinema. However…
绝对是好题 #include<bits/stdc++.h> using namespace std; #define maxn 300005 #define ll long long ll sum1[maxn],sum2[maxn],sum3[maxn],sum[maxn],n,a[maxn][]; int main(){ cin>>n; ;i<=n;i++)cin>>a[i][]; ;i<=n;i++)cin>>a[i][]; ;i<=n…