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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#692031#8551. DFS Order 5szy10010WA 39ms28756kbC++233.2kb2024-10-31 13:40:172024-10-31 13:40:19

Judging History

你现在查看的是最新测评结果

  • [2024-10-31 13:40:19]
  • 评测
  • 测评结果:WA
  • 用时:39ms
  • 内存:28756kb
  • [2024-10-31 13:40:17]
  • 提交

answer

#include <map>
#include <set>
#include <queue>
#include <deque>
#include <cmath>
#include <vector>
#include <cstring>
#include <iostream>
#include <algorithm>
#include <unordered_map>
using namespace std;
#define fi first
#define se second
#define u1 (u<<1)
#define u2 (u<<1|1)
#define pb push_back
#define pp pop_back()
#define int long long
#define laile cout<<"laile"<<endl
#define lowbit(x) ((x)&(-x))
#define double long double
#define sf(x) scanf("%lld",&x)
#define sff(x,y) scanf("%lld %lld",&x,&y)
#define sd(x) scanf("%Lf",&x)
#define sdd(x,y) scanf("%Lf %Lf",&x,&y)
#define _for(i,n) for(int i=0;i<(n);++i)
#define _rep(i,a,b) for(int i=(a);i<=(b);++i)
#define _pre(i,a,b) for(int i=(a);i>=(b);--i)
#define all(x) (x).begin(), (x).end()
#define IOS ios::sync_with_stdio(false);cin.tie(0);cout.tie(0)
typedef unsigned long long ULL;
typedef pair<int,int>PII;
const int N=1e6+10,INF=4e18;
int n,m;
int h[N],e[N],ne[N],idx;
int depth[N],fa[N][20],sz[N],cnt[N],son[N];
void add(int a,int b)
{
	e[idx]=b;
	ne[idx]=h[a];
	h[a]=idx++;
}
void bfs(int root)
{
	memset(depth,0x3f,sizeof(depth));
	depth[0]=0;
	depth[root]=1;
	queue<int>q;
	q.push(root);
	while(q.size())
	{
		auto t=q.front();
		q.pop();
		for(int i=h[t];~i;i=ne[i])
		{
			int j=e[i];
			if(depth[j]>depth[t]+1)
			{
				depth[j]=depth[t]+1;
				q.push(j);
				fa[j][0]=t;
				for(int i=1;i<=19;i++)
					fa[j][i]=fa[fa[j][i-1]][i-1];
			}
		}
	}
	return;
}
//int la(int a,int dep)
//{
//	for(int i=19;i>=0;i--)
//		if(fa[a][i]<=dep)
//			a=fa[a][i];
//	return a;
//}
int la(int v, int d) {
	for (int k = 20; k >= 0; --k) {
		if (d >= (1 << k)) {
			v = fa[v][k];
			d -= (1 << k);
		}
	}
	return v;
}
int lca(int a,int b)
{
	if(depth[a]<depth[b])swap(a,b);
	for(int i=19;i>=0;i--)
		if(depth[fa[a][i]]>=depth[b])a=fa[a][i];
	if(a==b)return a;
	for(int i=19;i>=0;i--)
		if(fa[a][i]!=fa[b][i])
			a=fa[a][i],b=fa[b][i];
	return fa[a][0];
}
void dfs(int u,int fa)
{
	sz[u]=1;
	for(int i=h[u];~i;i=ne[i])
	{
		int j=e[i];
		if(j==fa)continue;
		dfs(j,u);
		sz[u]+=sz[j];
	}
	return ;
}
void solve()
{
	memset(h,-1,sizeof(h));
	cin>>n>>m;
	_rep(i,2,n)
	{
		int a,b;
		cin>>a>>b;
		add(a,b);
		add(b,a);
	}
	bfs(1);
	dfs(1,0);
	while(m--)
	{
		cin>>n;
		bool bl=true;
		int pre=0;
		vector<int>v;
		_rep(i,1,n)
			cin>>son[i],cnt[son[i]]=1;
		_rep(i,1,n)
		{
			if(pre)
			{
				if(pre==fa[son[i]][0])
				{
					v.pb(son[i]);
					pre=son[i];
					continue;
				}
				else
				{
					bool pan=true;
					int lc=lca(pre,son[i]);
					while(v.size())
					{
						if(depth[v.back()]<depth[son[i]])break;
						cnt[fa[v.back()][0]]+=cnt[v.back()];
						if(cnt[v.back()]!=sz[v.back()])
						{
//							cout<<v.back()<<" "<<cnt[v.back()]<<" "<<sz[v.back()]<<'\n';
							pan=false;
							break;
						}
						v.pp;
					}
					if(!pan||!fa[son[i]]||fa[son[i]][0]!=lc)
					{
//						cout<<son[i]<<" "<<cnt[lc_1]<<" "<<sz[lc_1]<<endl;
						bl=false;
						break;
					}
					v.pb(son[i]);
				}
			}
			pre=son[i];
		}
		_rep(i,1,n)cnt[son[i]]=0;
		if(bl)cout<<"Yes\n";
		else cout<<"No\n";
	}
	return ;
}
signed main()
{
	IOS;
	int T=1;
//	cin>>T;
	while(T--)
		solve();
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 28632kb

input:

6 7
1 2
1 3
2 4
3 5
2 6
2 4 1
2 4 2
2 4 3
2 4 4
2 4 5
2 4 6
6 1 2 6 4 3 5

output:

No
No
Yes
No
No
Yes
Yes

result:

ok 7 tokens

Test #2:

score: -100
Wrong Answer
time: 39ms
memory: 28756kb

input:

10 100000
7 2
1 7
7 10
8 6
8 7
1 3
4 5
9 5
5 8
8 8 9 7 2 8 1 6 1
4 8 3 5 2
6 7 10 3 9 9 1
1 1
8 10 3 2 9 3 8 7 3
7 5 6 2 8 5 9 1
6 3 4 6 2 1 3
5 8 9 2 4 9
1 3
2 1 5
5 8 5 1 7 9
10 5 2 9 2 6 4 10 6 3 8
3 4 5 8
2 8 4
9 4 10 1 2 4 3 3 6 3
1 3
6 1 1 6 8 3 1
3 7 3 2
3 9 1 5
4 3 7 8 10
9 4 2 3 10 2 5 4 3 ...

output:

No
No
No
Yes
No
No
No
No
Yes
No
No
No
No
No
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
Yes
No
No
No
No
No
No
Yes
No
No
No
No
No
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Yes
No
No
Yes
Yes
No
No
No
No
Yes
No
No
No
No
No
No
No
No
Yes
No
No
No
No
No
No
No...

result:

wrong answer 30th words differ - expected: 'No', found: 'Yes'