3求最大字串和
来源:互联网 发布:淘宝助理查找html源码 编辑:程序博客网 时间:2024/05/16 14:05
Nowadays, a kind of chess game called “Super Jumping! Jumping! Jumping!” is very popular in HDU. Maybe you are a good boy, and know little about this game, so I introduce it to you now.<br><br><center><img src=/data/images/1087-1.jpg></center><br><br>The game can be played by two or more than two players. It consists of a chessboard(棋盘)and some chessmen(棋子), and all chessmen are marked by a positive integer or “start” or “end”. The player starts from start-point and must jumps into end-point finally. In the course of jumping, the player will visit the chessmen in the path, but everyone must jumps from one chessman to another absolutely bigger (you can assume start-point is a minimum and end-point is a maximum.). And all players cannot go backwards. One jumping can go from a chessman to next, also can go across many chessmen, and even you can straightly get to end-point from start-point. Of course you get zero point in this situation. A player is a winner if and only if he can get a bigger score according to his jumping solution. Note that your score comes from the sum of value on the chessmen in you jumping path.<br>Your task is to output the maximum value according to the given chessmen list.<br>
Input
Input contains multiple test cases. Each test case is described in a line as follow:<br>N value_1 value_2 …value_N <br>It is guarantied that N is not more than 1000 and all value_i are in the range of 32-int.<br>A test case starting with 0 terminates the input and this test case is not to be processed.<br>
Output
For each case, print the maximum according to rules, and one line one case.<br>
Sample Input
3 1 3 24 1 2 3 44 3 3 2 10
Sample Output
4103
思路:动态规划,遍历。
设dp[i]为以num[i]为结尾时,这个字串的和,然后依次求出数串中每个元素结尾时的字串和,求出最大值便可。例如
1,2,3,5,,4
字串有
1
1,2
1,2,3
1,2,3,5
1,2,3,4
显然1,2,3,5字串和最大为11故输出便可
#include<iostream>
#include<cstring>using namespace std;
int num[1001];
int dp[1001];//表示以i为结尾的字串的和
int main()
{
int n,max;
while(cin>>n)
{
memset(dp,0,sizeof(dp));
if(n==0)
break;
for(int i=1;i<=n;++i)
{
cin>>num[i];
dp[i] = num[i];
}
for(int i=1;i<=n;++i)
{
for(int j=1;j<i;++j)
{
if(num[j] < num[i]&&dp[j] + num[i] > dp[i])//比前一个数小,并且这个数之前的字串和加上这个数时要大于这个数
{
dp[i] = dp[j] + num[i];
}
}
}
int max = -1000000;
for(int i=1;i<=n;++i)//求最大值
{
if(dp[i] > max)
max = dp[i];
}
cout<<max<<endl;
}
}
0 0
- 3求最大字串和
- C++:求最大字串
- 数据机构-----求最大字串数据和问题
- HDOJ 1003 经典DP--求最大字串和
- 给定无序数组求连续字串最大和
- 求字符串的最大字串
- 最大字串和_2
- 最大字串和
- 最大字串和
- 最大字串和问题
- 最大连续字串和
- 最大连续字串和
- 求两个字符串的最大公共字串
- 求最大连续递增数字串
- 求一个字符串的最大重复字串
- 求最大连续递增数字串
- 求最大连续递增数字串
- 求最大连续递增数字串
- poj 2456 Aggressive cows(二分搜素)
- vi的各项配置
- 推荐一款软件 马克鳗(设计稿标注、测量工具)
- POJ-3264-Balanced Lineup(裸线段树)
- 常见数学中的特殊符号
- 3求最大字串和
- Activity的三种关闭方法分析(finish;onDestory;exit)
- UIscrollView
- 分段和分页
- java面试中遇到的问题
- poj 2536 Gopher II 最大匹配
- hustoj 昂贵的聘礼
- Javascript复习第三天动态显示时间
- 1022