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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#708112#8056. Travel 2WolamRE 0ms0kbC++172.4kb2024-11-03 19:37:132024-11-03 19:37:15

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你现在查看的是最新测评结果

  • [2024-11-03 19:37:15]
  • 评测
  • 测评结果:RE
  • 用时:0ms
  • 内存:0kb
  • [2024-11-03 19:37:13]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int maxn = 3e3 + 10;
int id[maxn][maxn],d[maxn],mx,cnt[maxn],vis[maxn];
vector<pair<int,int>> edge;
void init(void)
{
    for(int i=1;i<=mx;i++)
    {
        vis[i]=0;
        cnt[i]=0;
        d[i]=0;
        for(int j=1;j<=mx;j++)
        {
            id[i][j]=0;
        }
    }
    mx=0;
    edge.clear();
}
int walk(int i)
{
    cout<<"> "<<i<<endl;
    int v;
    cin>>v;
    mx=max(mx,v);
    cin>>d[v];
    return v;
}
void dfs(int u,int pa)
{
    if(vis[u]&&pa)
    {
        if(id[u][pa])
        {
            walk(id[u][pa]);
        }
        for(int i=cnt[u]+1;i<=d[u];i=cnt[u]+1)
        {
            cnt[u]++;
            int v=walk(i);
            id[u][v]=i;
            if(v==pa)
            {
                return;
            }
            if(u<v)
                edge.emplace_back(u,v);
            else
                edge.emplace_back(v,u);
            if(!vis[v])
            {
                dfs(v,u);
                walk(id[v][u]);
            }
            else
            {
                dfs(v,u);
            }
        }
    }
    else
    {
        vis[u]=1;
        for(int i=cnt[u]+1;i<=d[u];i=cnt[u]+1)
        {
            cnt[u]++;
            int v=walk(i);
            id[u][v]=i;
            if(u<v)
                edge.emplace_back(u,v);
            else
                edge.emplace_back(v,u);
            if(!vis[v])
            {
                dfs(v,u);
                walk(id[v][u]);
            }
            else
            {
                dfs(v,u);
            }
        }
    }
}
void solve(void)
{
    init();
    int root;
    cin>>root;
    cin>>d[root];
    dfs(root,0);
    sort(edge.begin(),edge.end());
    edge.erase(unique(edge.begin(),edge.end()),edge.end());
    cout<<"! ";
    for(int i=0;i<(int)edge.size();i++)
    {
        cout<<edge[i].first<<" "<<edge[i].second;
        if(i==(int)edge.size()-1)
        {
            cout<<endl;
        }
        else
        {
            cout<<" ";
        }
    }
    string s;
    cin>>s;
    if(s=="Wrong")
    {
        assert(false);
    }
}
int main(void)
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int t;
    cin>>t;
    while(t--)
    {
        solve();
    }
    return 0;
}

Details

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Test #1:

score: 0
Runtime Error

input:

2
1 1
2 1
1 1
2 1
1 1
Correct
1 3
2 2
1 3
2 2
4 2
1 3
3 1

output:

> 1
> 1
> 1
> 1
! 1 2
> 1
> 1
> 1
> 2
> 1
> 2
> 3

result: