QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#693683#8551. DFS Order 5szy10010WA 39ms35720kbC++233.1kb2024-10-31 16:33:472024-10-31 16:33:56

Judging History

你现在查看的是最新测评结果

  • [2024-10-31 16:33:56]
  • 评测
  • 测评结果:WA
  • 用时:39ms
  • 内存:35720kb
  • [2024-10-31 16:33:47]
  • 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],son[N];
int tr[N+10];//c[N];
int query(int x)
{
	int res=0;
	for(int i=x;i;i-=lowbit(i))res+=tr[i];
	return res;
}
void addtree(int x,int c)
{
	for(int i=x;i<=N;i+=lowbit(i))tr[i]+=c;
}
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 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];
}
int id[N],nowid;
void dfs(int u,int fa)
{
	sz[u]=1;
	id[u]=++nowid;
	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];
		_rep(i,1,n)
		{
			if(pre)
			{
				if(pre!=fa[son[i]][0])
				{
					int lc=lca(pre,son[i]);
					int presiz=query(id[pre]+sz[pre]-1)-query(id[pre]-1);
					int nowsiz=query(id[son[i]]+sz[son[i]]-1)-query(id[son[i]]-1);
					if(!fa[son[i]][0]||fa[son[i]][0]!=lc||presiz!=sz[pre]||nowsiz!=0)
					{
						bl=false;
						break;
					}
				}
				else 
				{
					int nowsiz=query(id[son[i]]+sz[son[i]]-1)-query(id[son[i]]-1);
					if(nowsiz)
					{
						bl=false;
						break;
					}
					
				}
			}
			v.pb(id[son[i]]);
			addtree(id[son[i]],1);
			pre=son[i];
		}
		for(auto i:v)addtree(i,-1);
		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: 3ms
memory: 35720kb

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: 35172kb

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
No
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
No
No
No
No
No
No
No
No
N...

result:

wrong answer 899th words differ - expected: 'No', found: 'Yes'