uva 624 CD 01背包打印路径

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// 集训终于开始了，来到水题先#include <cstdio>#include <cstring>#include <algorithm>#include <iostream>using namespace std;int a[23];int d[23][100000];int flag[23];int W,n;void init(){    cin >> n;    for (int i=1;i<=n;i++)        cin >> a[i];    memset(flag,0,sizeof(flag));    memset(d,0,sizeof(d));}void print(int x,int y){    if (y<=0||x<1)  return ;    //cout << x << " " << y << endl;    if (d[x][y]==d[x-1][y]){        flag[x] = 0;        print(x-1,y);        //return ;    }else if (d[x][y]==d[x-1][y-a[x]] + a[x]){        flag[x] = 1;        //cout << a[x] << " ";        print(x-1,y-a[x]);        //return ;    }}void solve(){    for (int i=1;i<=n;i++){        for (int j=W;j>=0;j--){            d[i][j] = d[i-1][j];            if (j>=a[i])                d[i][j] = max(d[i-1][j],d[i-1][j-a[i]] + a[i]);        }    }    print(n,W);    for (int i=1;i<=n;i++)        if (flag[i])            printf("%d ",a[i]);    printf("sum:%d\n",d[n][W]);}int main(){    //freopen("1.txt","r",stdin);    while(cin >> W){        init();        solve();    }}

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