UVa 624 CD（01背包并打印）

第一次做把选择的打印出来的背包题目，于是还是更新下，把代码贴出来。

题目很简单，为了让打印更加顺利，选择从后往前选择物品。

#include <cstdio>
#include <cstdlib>
#include <cstring>

const int MAXN = 10010;

int dp[MAXN];
int time[25];
bool f[25][MAXN];

int main()
{
    int w, n;
    while (scanf("%d", &w) != EOF)
    {
        scanf("%d", &n);

        memset(dp, 0, sizeof(dp));
        memset(f, false, sizeof(f));

        for (int i = 1; i <= n; ++i)
            scanf("%d", &time[i]);

        for (int i = n; i >= 1; --i)
            for (int v = w; v >= time[i]; --v)
                if (dp[v] < dp[v-time[i]] + time[i])
                    dp[v] = dp[v-time[i]] + time[i], f[i][v] = true;

        for (int i = 1, j = w; i <= n; ++i)
            if (f[i][j])
                printf("%d ", time[i]), j -= time[i];

        printf("sum:%d\n", dp[w]);
    }
    return 0;
}