G - Super Jumping! Jumping! Jumping!(动态规划)

G - Super Jumping! Jumping! Jumping!

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.



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.
Your task is to output the maximum value according to the given chessmen list.

Input Input contains multiple test cases. Each test case is described in a line as follow:
N value_1 value_2 …value_N
It is guarantied that N is not more than 1000 and all value_i are in the range of 32-int.
A test case starting with 0 terminates the input and this test case is not to be processed.
Output For each case, print the maximum according to rules, and one line one case.
Sample Input

3 1 3 2
4 1 2 3 4
4 3 3 2 1
0

Sample Output

4
10
3

嗯这题我是百度的 不知道要怎么说我觉得我的思路是对的 就是和百度上有一点点的不一样 我是逆向过来的   但是wa了

如果你恰好看到恰好知道嘿嘿麻烦告诉我~~~~~~~~~谢谢

代码如下

#include 
#include 
#include 
#include 
using namespace std;
int dp[1005];
int num[1005];
int main()
{
	int n;
	while(scanf("%d",&n)&&n>0)
	{
		for(int i=1;i<=n;i++)
		{
			scanf("%d",&num[i]);
			dp[i]=num[i];
		}
		memset(dp,0,sizeof(dp));
		dp[1]=num[1];
		int maxx=dp[1],i,j;
		for(i=1;i<=n;i++)
		{
			for( j=i+1;j<=n;j++)
			{
				if(num[j]>num[i])
				dp[j]=max(dp[j],dp[i]+num[j]);
				if(dp[j]>maxx)maxx=dp[j];    
			}
	    }
		printf("%d\n",maxx);
	}
	return 0;
}

正确的代码如下：

#include 
#include 
#include 
#include 
using namespace std;
int dp[1005];
int num[1005];
int main()
{
	int n;
	while(scanf("%d",&n)&&n>0)
	{
		for(int i=1;i<=n;i++)
		{
			scanf("%d",&num[i]);
			dp[i]=num[i];
		}
		memset(dp,0,sizeof(dp));
		dp[1]=num[1];
		int maxx=dp[1],i,j;
		for(i=2;i<=n;i++)
		{
			dp[i]=num[i];
			for(j=1;jmaxx)maxx=dp[i];  
	    }
		printf("%d\n",maxx);
	}
	return 0;
}