UVa 624 - CD

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UVa 624 - CD

题意

输出让磁带装最多的歌曲的分钟数

思路

0-1背包,增加了输出解。因为我是顺序推过去的,就是逆序输出来。

代码

#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
const int MAXN = 15000;

int d[MAXN], CD[25], vis[25][MAXN];

int main()
{
    //freopen("input.txt", "r", stdin);
    int T, i, j, n, total;
    while (~scanf("%d", &total))
    {
        scanf("%d", &n);
        for (i = 1; i <= n; i++)
            scanf("%d", &CD[i]);
        memset(d, 0, sizeof(d));
        memset(vis, 0, sizeof(vis));
        for (i = 1; i <= n; i++)
        {
            for (j = total; j >= CD[i]; j--)
            {
                if (d[j] < d[j - CD[i]] + CD[i])
                {
                    d[j] = d[j - CD[i]] + CD[i];
                    vis[i][j] = 1;
                }
            }
        }
        for (i = n, j = d[total]; i >= 1 && j > 0; i--)
        {
            if (vis[i][j])
            {
                printf("%d ", CD[i]);
                j -= CD[i];
            }
        }
        printf("sum:%d\n", d[total]);
    }
    return 0;
}

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