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;

}