UVA 624 CD 记录路径DP

开一个数组p

若dp[i-1][j]<dp[i-1][j-a[i]]+a[i]时就记录下p[j]=a[i];表示此时放进一个轨道

递归输出p

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <limits.h>
#include <malloc.h>
#include <ctype.h>
#include <math.h>
#include <string>
#include<iostream>
#include <algorithm>
using namespace std;
#define MAXN 11111
#include <queue>
#include <vector>
#define IN freopen("in.txt","r",stdin);
int a[30],dp[30][MAXN],p[MAXN];
void out(int x)
{
    if(x==0)
        return ;
    else    out(x-p[x]);
    printf("%d ",p[x]);
}
int main()
{
    int n,m;
   // IN;
    while(scanf("%d%d",&m,&n)!=EOF)
    {
        memset(dp,0,sizeof(dp));
        memset(p,0,sizeof(p));
        scanf("%d",&n);
        for(int i=1; i<=n; i++)
            scanf("%d",&a[i]);
        for(int i=1; i<=n; i++)
        {
            for(int j=m; j>0; j--)
            {
                if(j>=a[i]&&dp[i-1][j]<dp[i-1][j-a[i]]+a[i])
                    dp[i][j]=dp[i-1][j-a[i]]+a[i],p[j]=a[i];
                else
                    dp[i][j]=dp[i-1][j];
            }
        }
        int i;
        for(i=m;i>=0;i--)
            if(dp[n][i]>dp[n][i-1])
                break;
        out(i);
        printf("sum:%d\n",dp[n][m]);
    }
    return 0;
}

UVA 624 CD 记录路径DP

时间: 2024-11-01 13:45:58

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