hdu 4620 搜索

好苦逼，为啥数组开小了，不会runtime error，还得我WA了几个小时，我泪流满面。

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=4620

#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<vector>
using namespace std;

const int maxn = 35;

struct Cut{
    int T;
    int icnt;
    int bef_id;
    int a[11];
    bool operator < (const Cut& r) const{
        return T < r.T;
    }
}cut[maxn];
int N,M,W;
bool vis[400];
int ans[maxn],temp[maxn];
int anspv;

void dfs(int now,int fa_time,int deep){  // printf("now,fa_time,deep   %d %d %d\n",now,fa_time,deep);
    if(deep > anspv){
        anspv = deep;
        copy(temp,temp+anspv,ans);
        //for(int i=0;i<anspv;i++) printf("%d ",ans[i]);  printf("\n");
    }
    if(now >= N) return;

    if(deep + N-now <= anspv)   return;

    for(int i=now;i<N;i++){
        if(cut[i].T - fa_time > W && fa_time != -1) continue;
        int sta[11],cnt =0;
        for(int j=0;j<cut[i].icnt;j++){
            if(!vis[cut[i].a[j]])
                sta[cnt++] = cut[i].a[j];
        }
        if(cnt < 3) continue;
        for(int j=0;j<cnt;j++)
            vis[sta[j]] = true;

        temp[deep] = cut[i].bef_id;
        dfs(i+1,cut[i].T,deep+1);

        for(int j=0;j<cnt;j++)
            vis[sta[j]] = false;
    }
}
int main()
{
   //freopen("E:\\acm\\input.txt","r",stdin);
    int T;
    cin>>T;
    while(T--){
        cin>>N>>M>>W;
        int pv = 0;
        for(int i=1;i<=N;i++){
            int c,time;
            scanf("%d %d",&c,&time);
            if(c<3) continue;
            cut[pv].icnt = c;
            cut[pv].bef_id = i;
            cut[pv].T = time;
            for(int i=0;i<c;i++)
                scanf("%d",&cut[pv].a[i]);
            pv++;
        }
        N = pv;
        sort(cut,cut+N);

        anspv = 0;
        memset(vis,0,sizeof(vis));
        dfs(0,-1,0);
       sort(ans,ans+anspv);
        printf("%d\n",anspv);
        for(int i=0;i<anspv-1;i++){
            printf("%d ",ans[i]);
        }
        printf("%d\n",ans[anspv-1]);
    }
}